{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn07493_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Allegheny, Pennsylvania | 1906 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"132"},{"label":"placed","value":"91"},{"label":"unplaced","value":"41"},{"label":"fit sources","value":"georef-snap 48, georef 45, georef-street 5, snap:0 3"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 19 panels"},{"label":"unplaced pages","value":"p0 (tier 4, 40.46754,-80.02864 +/-5456m); p15 (tier 2, 40.47137,-80.04032 +/-102m); p17__1 (tier 1, 40.47238,-80.03676 +/-100m); p17__2 (tier 2, 40.46905,-80.03135 +/-2675m); p19 (tier 2, 40.46942,-80.03865 +/-100m); p23 (tier 1, 40.46642,-80.03827 +/-255m); p36__3 (tier 1, 40.46688,-80.01103 +/-100m); p38 (tier 1, 40.46015,-80.02857 +/-255m); p3__1 (tier 1, 40.47950,-80.04331 +/-127m); p3__2 (tier 2, 40.47634,-80.03599 +/-680m); p4 (tier 3, 40.47662,-80.04267 +/-507m); p41 (tier 1, 40.45717,-80.03347 +/-254m); p41s (tier 1, 40.45717,-80.03352 +/-253m); p42 (tier 1, 40.45863,-80.02919 +/-126m); p42s (tier 1, 40.45861,-80.02920 +/-128m); p48__2 (tier 2, 40.46555,-80.01540 +/-1448m); p61__1 (tier 1, 40.45197,-80.02889 +/-100m); p61__2 (tier 1, 40.45109,-80.02913 +/-126m); p75__1 (tier 1, 40.44698,-80.01654 +/-142m); p75__2 (tier 1, 40.44659,-80.01784 +/-249m); p76 (tier 2, 40.44838,-80.02152 +/-107m); p80 (tier 1, 40.44995,-80.01216 +/-260m); p81 (tier 1, 40.45162,-80.00806 +/-123m); p81s (tier 3, 40.45038,-80.00903 +/-507m); p82 (tier 1, 40.45531,-80.00822 +/-254m); p83 (tier 1, 40.44654,-80.01524 +/-260m); p84 (tier 1, 40.44751,-80.01306 +/-251m); p85 (tier 1, 40.44792,-80.01100 +/-128m); p86 (tier 1, 40.44681,-80.00870 +/-249m); p87__2 (tier 2, 40.44960,-80.00454 +/-100m); p9 (tier 1, 40.47478,-80.04293 +/-260m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0001/info.json","type":"ImageService2","height":7916,"width":6792},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6792.0,7817.5 6591.6,7916.0 -0.0,7916.0 0.0,-0.0 5598.6,-0.0 5915.7,4694.7 6792.0,4694.2 6792.0,7817.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03998032243345,40.482886208971124]}},{"type":"Feature","properties":{"resourceCoords":[6792.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03908387130208,40.4800008392756]}},{"type":"Feature","properties":{"resourceCoords":[6792.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04347410591583,40.47920053235415]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0443705570472,40.482085902049675]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0010/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0,7916 0,0 6664,0 6664,7916 0,7916\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04048575377554,40.47482432629611]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03891924533163,40.47224417534971]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0429199902318,40.47081863803983]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04448649867571,40.47339878898623]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0100/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p100","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0100/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0100/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4666.4,7199.4 2150.8,6525.2 1895.0,7916.0 -0.0,7916.0 -0.0,7010.2 440.2,4705.5 1298.8,4599.2 244.9,1156.5 -0.0,1214.7 -0.0,753.7 596.8,652.0 556.9,244.2 778.5,199.9 572.3,-0.0 6780.0,-0.0 6780.0,7916.0 6634.4,7916.0 6766.5,7277.2 4724.6,6869.6 4666.4,7199.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0100/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04777046329333,40.49672840025305]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04126014696821,40.49333111239155]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04643929352389,40.48750969926416]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05294960984901,40.490906987125655]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0101/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p101","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0101/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0101/info.json","type":"ImageService2","height":7916,"width":6776},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6370.8,7186.4 4252.9,7300.7 4234.7,7916.0 -0.0,7916.0 -0.0,2963.6 6511.9,1451.2 6370.8,7186.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0101/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05831800543365,40.49845294293994]}},{"type":"Feature","properties":{"resourceCoords":[6776.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05556991861599,40.496294604872965]}},{"type":"Feature","properties":{"resourceCoords":[6776.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05886243135738,40.4938360085287]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06161051817504,40.49599434659568]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0102/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p102","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0102/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0102/info.json","type":"ImageService2","height":7916,"width":6776},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5906.7,6176.0 3669.0,6271.5 3679.0,6796.6 563.3,7184.9 649.8,1506.7 5731.7,325.4 5906.7,6176.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0102/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6032.0,1824.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0542255,40.4941022]}},{"type":"Feature","properties":{"resourceCoords":[652.0,7200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0586822,40.4941667]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0103/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p103","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0103/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0103/info.json","type":"ImageService2","height":7916,"width":6808},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1684.4 985.2,1696.9 1011.2,1080.3 2577.8,1055.9 5077.2,657.7 6285.5,622.5 6413.7,7826.9 -0.0,7916.0 -0.0,1684.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0103/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05960152992611,40.495487055630186]}},{"type":"Feature","properties":{"resourceCoords":[6808.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05681218186929,40.493350908751175]}},{"type":"Feature","properties":{"resourceCoords":[6808.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06005538273561,40.49086701823234]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06284473079243,40.493003165111354]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0104/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p104","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0104/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0104/info.json","type":"ImageService2","height":7916,"width":6804},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 172.2,7823.4 150.0,122.0 6804.0,45.7 6804.0,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0104/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0570767283129,40.49357069918226]}},{"type":"Feature","properties":{"resourceCoords":[6804.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05423956266348,40.49145558005992]}},{"type":"Feature","properties":{"resourceCoords":[6804.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05745263307068,40.48892754994216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06028979872009,40.4910426690645]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0105/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p105","metadata":[{"label":"streets","value":"18"},{"label":"intersections","value":"22"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0105/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0105/info.json","type":"ImageService2","height":7916,"width":6692},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4375.7,264.2 4383.0,411.7 6126.9,365.1 6143.6,1284.4 5637.7,1287.0 4756.4,1469.1 5124.4,3310.5 6527.3,3279.5 6359.9,5859.5 6692.0,5849.9 6692.0,7916.0 -0.0,7916.0 -0.0,0.0 457.2,0.0 466.1,382.3 4375.7,264.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0105/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4420.0,2320.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0525352,40.4901524]}},{"type":"Feature","properties":{"resourceCoords":[2756.0,1304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0547691,40.4897653]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p11","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0011/info.json","type":"ImageService2","height":7916,"width":6764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2730.5,4354.6 -0.0,4250.7 -0.0,791.9 2196.2,915.8 2053.9,0.0 4715.4,671.8 5846.0,1780.3 6764.0,6696.9 6764.0,7916.0 4753.5,7916.0 3105.4,6767.4 2730.5,4354.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4128.0,532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0380103,40.4753028]}},{"type":"Feature","properties":{"resourceCoords":[2048.0,-24.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0395935,40.4752652]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0012/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4500.3,5451.8 4514.0,7916.0 625.7,7916.0 -0.0,5807.9 -0.0,2152.9 980.9,2375.1 2243.1,3526.5 3448.5,2160.8 2099.5,1249.1 2019.7,1017.2 4538.2,513.6 5891.6,2031.7 5805.7,4527.9 4500.3,5451.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0012/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0388194324761,40.47544141665509]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03504936389527,40.47622549721717]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03383353090624,40.47279483776593]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03760359948707,40.47201075720385]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p13","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0013/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1314.2,4181.9 1411.2,2027.9 1644.2,1904.9 1412.3,1897.7 1414.2,1679.2 -0.0,162.0 -0.0,-0.0 3279.2,0.0 3273.9,181.1 3720.2,408.2 6752.0,375.5 6752.0,7736.1 6422.3,7720.4 6415.8,7916.0 -0.0,7916.0 -0.0,5101.2 1314.2,4181.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0013/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03623329338629,40.475809374654034]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03243009329722,40.476617716704375]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03119299601181,40.473201957902944]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03499619610088,40.4723936158526]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0014/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6664.0,3919.5 6664.0,5434.8 5751.1,5225.4 5133.0,7262.9 6664.0,7290.8 6664.0,7916.0 5885.6,7916.0 5886.5,7601.9 5031.0,7599.2 4934.9,7916.0 4798.1,7916.0 4707.3,7598.2 3715.5,7595.2 3879.7,7916.0 -0.0,7916.0 202.0,7821.6 206.7,7625.0 538.0,7637.8 470.6,245.2 1031.9,276.9 3791.3,1145.1 4347.8,970.1 6664.0,3919.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0326728959801,40.476507014160454]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02892637192068,40.47727518962081]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.027735207747,40.4738659390119]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03148173180642,40.47309776355154]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p16","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0016/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5947.1,6851.3 5935.9,7916.0 -0.0,7916.0 0.0,0.0 3957.8,0.0 4543.0,3006.7 5208.7,3286.8 5028.8,2661.7 5331.7,2447.9 6664.0,2431.2 6664.0,6857.3 5947.1,6851.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04043004384756,40.472585275427925]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03664951968518,40.473333029070375]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03548194661046,40.46991663406401]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03926247077284,40.46916888042156]}},{"type":"Feature","properties":{"resourceCoords":[5956.0,6000.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0361662,40.4706641]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p18 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6664.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6664.0,6352.4 6508.9,3827.8 5715.4,3842.9 6363.6,-0.0 2545.4,81.2 2846.4,7916.0 6072.6,7916.0 6664.0,6352.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2452.0,2848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0308262,40.4733299]}},{"type":"Feature","properties":{"resourceCoords":[6564.0,5480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0317704,40.4713756]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p18 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2227.6"},{"label":"split_canvas_h","value":"2196.8"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.7,2026.7 2218.2,2064.7 2227.6,0.0 0.0,0.0 0.0,865.7 320.6,962.0 321.1,1100.3 0.0,1193.2 0.0,2159.2 163.7,2162.0 167.7,2026.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02821955953134,40.47391160143294]}},{"type":"Feature","properties":{"resourceCoords":[2227.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02789195482882,40.47296212448141]}},{"type":"Feature","properties":{"resourceCoords":[2227.6,2196.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02911354018053,40.47271475561662]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2196.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02944114488305,40.47366423256815]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0002/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5897.0,-0.0 5475.8,6273.5 6664.0,6353.3 6664.0,7916.0 -0.0,7916.0 -0.0,7689.3 1865.2,7724.7 2073.7,4657.8 1202.9,4596.4 1208.1,-0.0 5897.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1208.0,6464.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0428348,40.4796531]}},{"type":"Feature","properties":{"resourceCoords":[1208.0,92.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0393119,40.4804911]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p20","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0020/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1476.9,7916.0 -0.0,1104.0 4694.1,1064.8 4696.4,0.0 6272.7,0.0 6258.8,2007.3 6512.5,2010.4 6558.8,5172.8 5938.4,5981.1 5936.9,7916.0 1476.9,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03871566976947,40.46978569718316]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0349270556361,40.47050936582835]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03379708985972,40.4670856600536]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03758570399309,40.46636199140841]}},{"type":"Feature","properties":{"resourceCoords":[4692.0,1988.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0357644,40.4694354]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0021/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3370.0,7916.0 -0.0,7916.0 -0.0,4923.0 844.7,2644.1 814.6,1803.8 771.7,1804.1 757.7,216.0 -0.0,213.9 27.1,-0.0 6752.0,-0.0 6752.0,429.1 6446.3,433.1 6529.5,7592.6 3372.2,7661.1 3370.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03085587332389,40.47190258738374]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02991721903099,40.468972791553]}},{"type":"Feature","properties":{"resourceCoords":[6752.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03440072132781,40.46812970466583]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03533937562071,40.471059500496565]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0022/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6664.0,-0.0 6664.0,7359.6 41.8,7382.0 719.8,3888.9 -0.0,3890.7 0.0,0.0 6664.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02670614223926,40.472678088742974]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0257996936359,40.46980684359721]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03025167093996,40.46898194206415]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03115811954332,40.47185318720991]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0024/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5726.5,2007.0 5680.5,2569.4 6152.1,3161.3 6105.6,5963.0 1951.4,5912.7 2076.4,6138.1 -0.0,6174.9 0.0,-0.0 935.8,0.0 1149.0,1610.5 5726.5,2007.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03766158423065,40.467023532488234]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03407683548522,40.46796652893325]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03261479157466,40.46470403318083]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03619954032008,40.46376103673581]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0025/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4425.6,2172.6 4413.6,4298.0 6647.0,7247.8 4107.0,7361.1 3562.4,7868.2 1059.7,7852.6 160.6,7095.4 246.2,-0.0 5072.3,-0.0 5067.7,2138.3 4425.6,2172.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0302429677987,40.46917154895219]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02926174166969,40.46627174587147]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03369391106436,40.46539142815918]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03467513719337,40.4682912312399]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0026/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6300.5,5118.8 6650.1,6277.5 2238.2,7486.1 -0.0,4610.5 -0.0,2449.9 638.5,2412.1 631.1,285.0 -0.0,288.6 0.0,0.0 5202.8,-0.0 5113.0,5475.1 6300.5,5118.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02943615012923,40.46729939642853]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02848500804346,40.464421573227874]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03294682625666,40.46355592941276]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03389796834243,40.46643375261342]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0027/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0027/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,-0.0 4675.5,0.0 6512.7,5149.5 5789.9,5350.4 5767.4,7709.0 3534.5,7464.8 3487.8,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03791179693141,40.46409158369309]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03429596716802,40.465097922874996]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03275793444416,40.46185374273753]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03637376420755,40.460847403555626]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p28","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0028/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0028/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6115.2,7916.0 1841.8,7783.8 1744.1,5481.3 2435.1,5245.7 257.8,0.0 4295.2,0.0 6115.2,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03568538482412,40.46487449079513]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03193355968168,40.46573934126309]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0305879928206,40.462361047793216]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03433981796304,40.46149619732526]}},{"type":"Feature","properties":{"resourceCoords":[4252.0,-212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0333362,40.4655142]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0029/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0029/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5232.1,6722.7 1569.4,7855.6 1196.2,6688.4 -0.0,7068.9 -0.0,0.0 5074.3,-0.0 4891.1,5132.5 6760.0,5149.3 6760.0,7740.5 6519.4,7916.0 5304.6,7916.0 5232.1,6722.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02784143746405,40.46520655414214]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0269503908571,40.4623116169482]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03137486615451,40.46151215836176]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03226591276146,40.4644070955557]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p30","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0030/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0030/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1789.9,7739.9 1730.0,7094.0 725.2,6888.3 689.2,5706.3 -0.0,5797.3 -0.0,-0.0 6688.0,0.0 6688.0,7584.4 1913.8,7623.9 1789.9,7739.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0030/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01602125040081,40.47308664075082]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0122207587552,40.473806689035435]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01110828682074,40.470360561220765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01490877846635,40.46964051293615]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p31","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0031/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0031/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4182.9,7916.0 1001.6,7916.0 1074.6,7529.6 -0.0,7367.1 -0.0,-0.0 6760.0,0.0 6760.0,6755.7 4182.9,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0031/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02150616290417,40.46843772450379]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01771130343472,40.46916168232433]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01660478168228,40.46575707377751]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02039964115173,40.46503311595697]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p32 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6688.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"640.4,6465.3 6263.5,6825.8 6552.6,2057.3 5737.4,957.5 4488.7,1876.5 4230.7,1795.2 3338.4,2360.9 2884.3,2461.5 2216.0,3009.6 0.0,3270.0 -0.0,6613.6 640.4,6465.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6492.0,3064.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0138604,40.4684939]}},{"type":"Feature","properties":{"resourceCoords":[6492.0,396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.014286,40.4695181]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p32 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4484.8"},{"label":"split_canvas_h","value":"3270.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"817.2,675.9 475.3,3214.1 617.3,3197.5 742.7,1410.6 1328.5,1392.4 1566.1,1985.5 1941.3,2199.9 2200.3,2161.3 2619.9,1934.9 2739.9,1982.2 4136.7,1084.6 4150.9,759.2 3667.2,590.7 3729.6,0.0 -0.0,-0.0 -0.0,601.6 817.2,675.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0032__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01889349507205,40.46945495623633]}},{"type":"Feature","properties":{"resourceCoords":[4484.8,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01400433685696,40.47092410205736]}},{"type":"Feature","properties":{"resourceCoords":[4484.8,3270.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01259515406237,40.46820999455405]}},{"type":"Feature","properties":{"resourceCoords":[0.0,3270.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01748431227746,40.466740848733025]}},{"type":"Feature","properties":{"resourceCoords":[4136.7,1083.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0139164,40.4699099]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0033/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p33","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0033/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0033/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"878.5,6217.4 921.6,2517.8 120.4,1542.8 1829.5,136.7 2731.4,137.1 4909.8,200.5 6552.0,224.8 6760.0,227.6 6760.0,7916.0 4416.3,7916.0 878.5,6217.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0033/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01487041542556,40.46985185952714]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01113015316473,40.47061257327468]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00996742675763,40.467257021352246]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01370768901846,40.46649630760471]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0034/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0034/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5990.7,5967.5 5967.9,6946.0 4274.7,7916.0 3882.0,7385.8 2944.6,7916.0 2507.3,7916.0 1818.5,6490.1 -0.0,6460.0 -0.0,-0.0 2969.3,0.0 3370.3,61.8 3295.2,453.6 6523.2,462.6 6062.1,1168.0 6015.9,3972.1 6688.0,3808.9 6688.0,5633.1 5990.7,5967.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02172225037576,40.46498088537493]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01802486300932,40.46569461511867]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01692228714532,40.4623415706771]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02061967451176,40.46162784093335]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p35","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0035/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1343.2,7338.2 183.4,7793.5 206.4,6832.3 891.6,6504.3 892.7,4712.5 232.3,4872.3 250.3,2401.0 397.9,1782.8 765.9,1402.2 3305.4,277.7 3306.3,0.0 3674.8,0.0 3685.0,167.2 4259.2,0.0 6760.0,0.0 6760.0,5842.7 6158.4,6604.3 6156.2,7430.9 5224.2,7412.9 5224.2,7412.9 1343.2,7338.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0035/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01866651637609,40.46601583430175]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01486239889718,40.46675204703877]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01373718867534,40.46333900405713]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01754130615424,40.462602791320116]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p36 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6688.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7719.3 800.8,7916.0 4440.0,7771.3 4919.7,7553.7 5083.2,7213.2 5083.2,6230.0 5082.8,5911.6 5168.4,5910.5 5204.2,3603.2 5293.8,3436.2 5298.8,3230.8 5402.8,3233.1 5784.5,2521.9 6688.0,2085.2 6688.0,920.4 4579.1,8.0 4561.8,786.7 3196.0,760.3 3195.7,0.0 579.9,66.3 595.5,5816.2 -0.0,6674.1 -0.0,7719.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3196.0,5236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0126519,40.4648014]}},{"type":"Feature","properties":{"resourceCoords":[3196.0,7792.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0122925,40.4636986]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p36 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"5258.4"},{"label":"split_canvas_y","value":"3230.8"},{"label":"split_canvas_w","value":"1429.6"},{"label":"split_canvas_h","value":"1707.2"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5297.1,3599.4 5326.4,4906.8 6688.0,4938.0 6688.0,4166.0 5297.1,3599.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0036__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[5258.4,3230.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01354078963517,40.46747268350003]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,3230.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01272331688497,40.46761421171907]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,4938.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01250299056383,40.46686717897184]}},{"type":"Feature","properties":{"resourceCoords":[5258.4,4938.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01332046331403,40.4667256507528]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p37","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0037/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2342.0,456.0 6760.0,438.9 6760.0,7916.0 -0.0,7916.0 -0.0,1116.1 2339.8,877.3 2342.0,456.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0037/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2344.0,456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0345709,40.4615585]}},{"type":"Feature","properties":{"resourceCoords":[6332.0,456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0321858,40.4620199]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0038s/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p38s","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0038s/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0038s/info.json","type":"ImageService2","height":7916,"width":6692},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1865.2,0.0 2155.4,479.5 1986.3,4786.5 92.6,4749.7 0.0,0.0 1865.2,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0038s/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03101268088224,40.461456028821054]}},{"type":"Feature","properties":{"resourceCoords":[6692.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0272887134712,40.46222088265983]}},{"type":"Feature","properties":{"resourceCoords":[6692.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02610791256501,40.458845621738305]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02983187997606,40.45808076789953]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0039/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5872.4,6832.8 -0.0,6893.6 -0.0,2559.1 -0.0,2379.0 -0.0,-0.0 5050.3,142.1 5228.7,3592.6 5801.0,3595.8 5872.4,6832.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03006543487488,40.46259362140315]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02628810763497,40.46324886212389]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02528670973429,40.45985966372573]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0290640369742,40.45920442300499]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p40","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0040/info.json","type":"ImageService2","height":7916,"width":6692},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3381.1,7408.5 918.2,7320.6 442.4,6934.6 558.7,3429.6 -0.0,3399.5 0.0,0.0 6692.0,0.0 6692.0,4397.2 5243.4,4374.3 5107.6,6645.5 3403.1,6702.7 3381.1,7408.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0040/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02722548515202,40.4630222880036]}},{"type":"Feature","properties":{"resourceCoords":[6692.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02344755965268,40.46382532461192]}},{"type":"Feature","properties":{"resourceCoords":[6692.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02219891191642,40.46042556268686]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02597683741575,40.45962252607854]}},{"type":"Feature","properties":{"resourceCoords":[4568.0,2488.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0242542,40.4625019]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p43","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0043/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6407.7,7094.9 224.5,7084.9 225.3,6391.0 -0.0,6502.3 -0.0,-0.0 6760.0,0.0 6760.0,4709.1 6424.5,4705.9 6407.7,7094.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0043/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3636.0,2872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0278095,40.4586014]}},{"type":"Feature","properties":{"resourceCoords":[3636.0,7092.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0272193,40.4567986]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p44","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0044/info.json","type":"ImageService2","height":7916,"width":6708},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2006.6,0.0 5428.3,819.2 6708.0,2416.7 6708.0,3343.9 5404.3,7063.4 4248.9,7068.1 4248.6,7215.4 1232.1,7080.3 -0.0,0.0 2006.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0044/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5404.0,7156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0233443,40.4575477]}},{"type":"Feature","properties":{"resourceCoords":[1248.0,6100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.025805,40.4575542]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0045/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"102.6,5594.0 1547.8,5532.2 1555.0,4626.8 167.9,4570.4 434.2,2351.0 2143.5,2267.1 2235.8,0.0 6760.0,0.0 6760.0,161.1 6463.3,153.8 6395.5,7396.8 4231.6,7350.4 4227.1,7916.0 207.6,7916.0 -0.0,7481.3 -0.0,7039.4 971.6,7123.5 1110.2,6740.8 756.4,6515.7 102.6,5594.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02483839731723,40.461520597906905]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02101970321061,40.462283122397544]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0198543541624,40.45885677951913]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02367304826902,40.45809425502849]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p46","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0046/info.json","type":"ImageService2","height":7916,"width":6708},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2384.4,0.0 3077.4,1393.4 3456.7,1387.1 4416.3,848.7 4765.3,1399.6 6257.9,478.3 6220.1,7784.2 6708.0,7785.2 6708.0,7916.0 4400.0,7916.0 4388.2,7210.7 88.7,7306.8 -0.0,0.0 2384.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0211647,40.4621831]}},{"type":"Feature","properties":{"resourceCoords":[6708.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0173617,40.4628661]}},{"type":"Feature","properties":{"resourceCoords":[6708.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0163025,40.4594516]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0201055,40.4587686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0047/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2090.1,7916.0 -0.0,7916.0 -0.0,578.9 1355.4,0.0 6204.8,0.0 6208.5,220.3 6744.0,321.4 6744.0,1739.5 6355.8,1746.9 5265.6,3950.3 2080.0,7429.7 2090.1,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0176283076387,40.46286286863779]}},{"type":"Feature","properties":{"resourceCoords":[6744.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01384333140886,40.46353625600527]}},{"type":"Feature","properties":{"resourceCoords":[6744.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01281174717029,40.46013217511808]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01659672340013,40.459458787750606]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0048__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p48 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6708.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0048__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0048/info.json","type":"ImageService2","height":7916,"width":6708},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,5743.3 -0.0,7223.0 6003.1,7342.8 6013.2,7916.0 6708.0,7916.0 6708.0,0.0 5165.7,0.0 4574.7,204.5 4040.1,695.3 3529.3,1939.6 3410.3,5124.4 3147.5,5614.2 2637.8,5818.5 -0.0,5743.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0048__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4816.0,3640.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0107668,40.4649936]}},{"type":"Feature","properties":{"resourceCoords":[1340.0,5784.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0122925,40.4636986]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0049/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4557.5,0.0 6325.9,0.0 6325.2,692.5 6142.2,691.4 6253.9,6659.7 4775.4,5858.0 1057.8,5922.5 1064.4,6945.0 167.4,6948.6 197.4,5485.7 3426.9,2186.9 4557.5,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01637619918826,40.46225430443897]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01261498494937,40.46298203455101]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01150081923033,40.45960130796821]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01526203346923,40.45887357785617]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p5","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0005/info.json","type":"ImageService2","height":7916,"width":6792},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6792.0,19.2 6792.0,847.4 5857.6,844.0 5841.8,5891.9 6062.4,7427.0 2644.2,6766.7 2889.9,7916.0 -0.0,7916.0 0.0,0.0 6792.0,19.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3968.0,4472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0391503,40.4763734]}},{"type":"Feature","properties":{"resourceCoords":[2676.0,260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0404486,40.4780469]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0050/info.json","type":"ImageService2","height":7916,"width":6708},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6708.0,7916.0 5733.7,7916.0 6080.4,5630.8 5824.7,5570.7 5363.6,5684.8 3502.0,7512.7 3041.1,7799.8 -0.0,6685.7 -0.0,678.4 182.2,682.9 195.6,0.0 6139.6,0.0 6162.5,552.4 6708.0,541.6 6708.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0129582737559,40.46291090297485]}},{"type":"Feature","properties":{"resourceCoords":[6708.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00922262070364,40.46369088503531]}},{"type":"Feature","properties":{"resourceCoords":[6708.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00802130704012,40.460313191870284]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01175696009238,40.45953320980982]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p51","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0051/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6210.6,0.0 6218.0,7493.2 5611.1,7492.8 5610.7,7868.9 -0.0,7916.0 0.0,0.0 6210.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0350642,40.4555784]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0312259,40.4562987]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0301154,40.4528725]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0339537,40.4521522]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p52","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0052/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0052/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,7539.1 608.2,7538.9 593.5,0.0 4436.0,0.0 4437.7,7722.1 4666.4,7722.0 4665.9,7916.0 3212.9,7916.0 3212.1,7538.3 3036.7,7538.2 2040.9,7538.6 2038.6,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0318726,40.456191]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0280417,40.4569068]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.026938,40.4534873]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0307689,40.4527715]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p53","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0053/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0053/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"232.3,7112.4 230.1,7916.0 -0.0,7916.0 -0.0,147.6 243.7,147.7 244.8,727.1 6748.0,669.7 6748.0,7119.9 232.3,7112.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0053/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6420.0,3924.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0252076,40.4557177]}},{"type":"Feature","properties":{"resourceCoords":[1028.0,1772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0285488,40.4560726]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p54","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0054/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0054/info.json","type":"ImageService2","height":7916,"width":6676},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1756.3,629.5 5523.2,759.3 5464.8,7112.7 1691.2,7070.7 1756.3,629.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0054/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1396.0,3876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0252076,40.4557177]}},{"type":"Feature","properties":{"resourceCoords":[5524.0,668.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0233443,40.4575477]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p55","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0055/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0055/info.json","type":"ImageService2","height":7916,"width":6732},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2291.2 -0.0,2116.2 1138.6,2126.6 1096.0,881.8 5127.0,828.4 5140.9,7637.9 5254.7,7637.8 5254.5,7916.0 1130.3,7916.0 1138.4,2309.1 -0.0,2291.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3180.0,5472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0217338,40.4563663]}},{"type":"Feature","properties":{"resourceCoords":[1140.0,1204.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0234857,40.4579838]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0056/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0056/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6688.0,5949.4 6688.0,7916.0 124.7,7916.0 113.4,7548.2 -0.0,7547.7 -0.0,237.4 6450.6,241.1 6468.5,5988.1 6688.0,5949.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0213998282154,40.458919408779806]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01761251271911,40.45965149057017]}},{"type":"Feature","properties":{"resourceCoords":[6688.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01648168756327,40.45621658604262]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02026900305955,40.45548450425226]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0057/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"767.2,6627.3 765.1,6253.7 543.4,6294.1 498.7,1193.1 4419.1,1109.4 4422.9,1954.2 6047.4,1938.2 6050.7,3522.0 6248.1,3523.3 6260.4,7338.9 2601.8,7313.6 2592.6,6629.3 767.2,6627.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01805547666324,40.45967658145455]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01427072447879,40.46039071574671]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01317741864058,40.45698869394555]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01696217082502,40.45627455965339]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p58","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0058/info.json","type":"ImageService2","height":7916,"width":6688},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"889.0,7327.2 924.2,3440.8 724.4,3437.6 740.8,1824.5 -0.0,1825.2 -0.0,788.7 3745.7,734.8 5556.2,1731.6 5507.5,4399.2 6688.0,4402.6 6688.0,7457.1 889.0,7327.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3276.0,3456.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0127622,40.459072]}},{"type":"Feature","properties":{"resourceCoords":[900.0,6108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0136981,40.4576991]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p59","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0059/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0059/info.json","type":"ImageService2","height":7916,"width":6748},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6084.6,7471.2 1224.8,7469.4 1169.5,4462.2 -0.0,4476.5 -0.0,1849.4 2756.2,2762.0 3209.0,2460.2 5097.6,504.6 5734.0,496.0 5457.0,2795.7 6432.9,2765.8 6348.1,0.0 6748.0,0.0 6748.0,6732.5 6076.2,6734.7 6084.6,7471.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0059/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01199557685695,40.460838003490416]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00821633833172,40.4615324956273]}},{"type":"Feature","properties":{"resourceCoords":[6748.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00715308542213,40.458135488332424]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01093232394736,40.45744099619554]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0006/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.6,5046.8 438.1,43.2 6403.5,0.0 6415.4,5950.0 3118.8,6052.0 3189.2,6200.0 662.4,6772.3 411.6,5046.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03882909231389,40.47809695938682]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03506696197303,40.478801377081126]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0339746378079,40.475378004664485]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03773676814876,40.47467358697018]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0060/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"837.3,7208.8 785.8,709.2 5963.0,727.9 5957.0,0.0 6756.0,0.0 6756.0,7916.0 5955.8,7916.0 6079.0,7107.4 837.3,7208.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01106089314464,40.457944561963814]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00723563341089,40.45865759262386]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00614533802043,40.4552231422377]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00997059775419,40.454510111577655]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0062/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p62","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0062/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0062/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"692.4,6409.0 710.7,7916.0 -0.0,7916.0 -0.0,1126.2 1171.0,1119.0 1174.1,1496.6 2626.8,1488.0 2618.1,495.5 6031.6,478.3 6096.6,6829.0 3664.0,6840.0 3660.4,6372.8 692.4,6409.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0062/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3664.0,6840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0268021,40.4510581]}},{"type":"Feature","properties":{"resourceCoords":[6052.0,2692.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0260086,40.4531001]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0063/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p63","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0063/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0063/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"311.0,7101.2 262.6,776.8 6290.2,762.1 6319.3,6379.0 3032.0,6411.3 3036.0,7096.0 311.0,7101.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0063/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3036.0,7096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0238661,40.4516033]}},{"type":"Feature","properties":{"resourceCoords":[284.0,3996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0258646,40.4526602]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0064/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p64","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"13"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0064/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0064/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1655.8,1271.6 1650.7,542.7 5701.5,508.8 5746.4,6412.6 928.6,6458.3 894.8,1275.4 1655.8,1271.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0064/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5748.0,7044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0192893,40.4526747]}},{"type":"Feature","properties":{"resourceCoords":[3668.0,1264.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0212868,40.4549928]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0065/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p65","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0065/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0065/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1252.0,7152.0 1259.4,7916.0 1255.5,7916.0 1225.9,1676.9 4089.9,1640.2 4100.6,5529.8 5376.0,5519.3 5394.3,7147.1 1252.0,7152.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0065/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1252.0,2332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0200931,40.455215]}},{"type":"Feature","properties":{"resourceCoords":[1252.0,7152.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0194284,40.4531114]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0066/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p66","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0066/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0066/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4069.1,7147.1 1297.8,7133.9 1283.9,5505.3 -0.0,5508.2 -0.0,1617.0 3660.5,1592.2 3649.7,0.0 5449.7,0.0 5679.3,7916.0 4064.1,7916.0 4069.1,7147.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0066/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01878625758144,40.45651964481593]}},{"type":"Feature","properties":{"resourceCoords":[6744.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01494936591094,40.45724018589287]}},{"type":"Feature","properties":{"resourceCoords":[6744.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0138456450543,40.453789102288326]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0176825367248,40.45306856121138]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p67","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0067/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0067/info.json","type":"ImageService2","height":7916,"width":6744},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1633.5,7916.0 1459.5,639.5 5048.2,671.0 5035.0,7227.9 4244.4,7227.6 4242.7,7916.0 1633.5,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0067/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3268.0,2732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0142536,40.4560956]}},{"type":"Feature","properties":{"resourceCoords":[5044.0,2732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0132386,40.4562886]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p68","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0068/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0068/info.json","type":"ImageService2","height":7916,"width":6752},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"787.7,7213.4 784.7,680.9 6016.6,750.6 6032.0,7200.0 5134.3,7200.8 5131.5,7916.0 -0.0,7916.0 -0.0,7215.0 787.7,7213.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1656.0,2732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0127394,40.4563836]}},{"type":"Feature","properties":{"resourceCoords":[6032.0,7200.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0095939,40.4549053]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0069/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p69","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0069/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0069/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6756.0,7330.2 6756.0,7916.0 -0.0,7916.0 -0.0,-0.0 3259.1,0.0 3256.8,512.9 5927.7,533.4 5928.0,2844.0 6756.0,2873.8 6756.0,3121.5 6368.0,3439.4 5327.3,4731.4 5327.7,6510.5 6756.0,7330.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0069/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5928.0,1788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0252569,40.4508218]}},{"type":"Feature","properties":{"resourceCoords":[5928.0,2844.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0251194,40.4504069]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0007/info.json","type":"ImageService2","height":7916,"width":6760},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"360.3,7124.9 176.6,1107.3 -0.0,1112.1 -0.0,-0.0 6760.0,0.0 6760.0,7757.3 4052.3,7077.1 813.3,7323.3 360.3,7124.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03545925414194,40.47924686291024]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03154763026922,40.47989362196181]}},{"type":"Feature","properties":{"resourceCoords":[6760.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0305589418027,40.47638482438259]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03447056567542,40.47573806533102]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p70","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0070/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0070/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,4557.3 1321.3,3069.1 1321.4,2854.8 555.8,2812.4 556.0,676.0 3334.0,698.0 3336.7,0.0 6756.0,0.0 6756.0,7916.0 -0.0,7916.0 -0.0,7501.8 1320.3,7502.1 1320.5,6976.2 -0.0,6231.7 -0.0,4557.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0070/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[556.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0252569,40.4508218]}},{"type":"Feature","properties":{"resourceCoords":[556.0,676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0254204,40.4513147]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0071/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p71","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"7"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0071/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0071/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1771.0,7504.7 957.2,7290.6 866.9,0.0 5739.4,0.0 5724.9,7539.1 1771.0,7504.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0071/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5748.0,5420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0186033,40.4506066]}},{"type":"Feature","properties":{"resourceCoords":[5748.0,1276.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0191914,40.4524002]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p72","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0072/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0072/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1264.0,6788.0 1257.7,976.9 5440.8,1007.2 5443.1,6802.2 1264.0,6788.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0072/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1264.0,2628.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0191914,40.4524002]}},{"type":"Feature","properties":{"resourceCoords":[1264.0,6788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0186033,40.4506066]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p73","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0073/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0073/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"496.2,970.0 3261.2,1043.1 3248.7,1810.4 4851.4,1845.0 4852.0,1870.8 6756.0,1906.5 6756.0,7916.0 4792.5,7916.0 4816.2,6817.6 408.0,6697.6 496.2,970.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0073/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01748189850089,40.453911794710436]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0136521656951,40.45469864812823]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01244905966634,40.45125997656793]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01627879247212,40.45047312315014]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0074/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p74","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0074/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0074/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,612.3 6244.2,496.3 6117.8,1322.3 6756.0,1321.3 6756.0,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0074/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6248.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0066239,40.4554552]}},{"type":"Feature","properties":{"resourceCoords":[924.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0095939,40.4549053]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0077/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p77","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0077/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0077/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,1438.4 476.4,1427.0 455.8,562.3 1273.8,753.8 5228.0,704.0 5208.3,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0077/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02139547625634,40.44947679360921]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01753365376997,40.45014392502612]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0165061527193,40.446701585411255]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02036797520567,40.44603445399434]}},{"type":"Feature","properties":{"resourceCoords":[5228.0,704.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0183157,40.4496869]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0078/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p78","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0078/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0078/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6756.0,2703.8 6756.0,7916.0 1112.6,7916.0 1313.6,454.7 5606.8,497.3 5611.9,2687.0 6756.0,2703.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0078/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01939051787531,40.45065736146462]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01566950523876,40.45138327767258]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01455962668487,40.44804206232383]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01828063932142,40.44731614611587]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0079/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p79","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0079/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0079/info.json","type":"ImageService2","height":7916,"width":6764},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,7560.6 2064.8,7541.6 2027.3,2321.5 871.0,2315.2 845.8,122.2 5406.6,146.7 5407.0,1282.9 6764.0,1253.3 6764.0,7916.0 6496.7,7916.0 5442.1,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0079/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01671538689783,40.45101403983965]}},{"type":"Feature","properties":{"resourceCoords":[6764.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.012987260273,40.45171353337072]}},{"type":"Feature","properties":{"resourceCoords":[6764.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01191904031441,40.44836990468655]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.01564716693925,40.44767041115548]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0008/info.json","type":"ImageService2","height":7916,"width":6664},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2536.7,6032.2 2509.0,4510.7 -0.0,1581.0 0.0,0.0 6664.0,0.0 6664.0,7916.0 1016.5,7916.0 1674.0,5789.5 2536.7,6032.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03035322187623,40.4772372815299]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02664528655386,40.477942418549766]}},{"type":"Feature","properties":{"resourceCoords":[6664.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02555186144332,40.474568316474446]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.02925979676569,40.47386317945458]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0082s/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p82s","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0082s/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0082s/info.json","type":"ImageService2","height":7916,"width":6756},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6087.8,6368.0 -0.0,6368.0 -0.0,242.6 6376.4,185.1 6374.7,0.0 6756.0,0.0 6756.0,7916.0 6079.6,7916.0 6087.8,6368.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0082s/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00901090317025,40.45183747768004]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00515481989486,40.45252355336885]}},{"type":"Feature","properties":{"resourceCoords":[6756.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00409814129567,40.44908632955446]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00795422457107,40.44840025386565]}},{"type":"Feature","properties":{"resourceCoords":[6088.0,7340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}},{"type":"Feature","properties":{"resourceCoords":[6088.0,7340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p87 [1]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6784.0"},{"label":"split_canvas_h","value":"7916.0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5780.0,0.0 5120.0,0.0 -0.0,0.0 -0.0,7916.0 6301.5,7904.9 6211.9,0.0 5780.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00823163633554,40.449059822087534]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00435957166113,40.44974874119246]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00330289306194,40.44631151737807]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00717495773635,40.44562259827315]}},{"type":"Feature","properties":{"resourceCoords":[6212.0,972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}},{"type":"Feature","properties":{"resourceCoords":[6212.0,972.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087s/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p87s","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087s/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087s/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6273.2,7916.0 6122.5,4175.3 6124.3,1560.0 6784.0,1554.7 6784.0,7916.0 6273.2,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0087s/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0081872366364,40.44909575024398]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00430802125162,40.44976098035476]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00328767732942,40.44631740886954]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.00716689271421,40.445652178758756]}},{"type":"Feature","properties":{"resourceCoords":[6128.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}},{"type":"Feature","properties":{"resourceCoords":[6128.0,984.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0045563,40.4492686]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0088/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p88","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0088/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0088/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 0.0,-0.0 6784.0,-0.0 6784.0,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0088/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4000.0,6888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0367827,40.4837916]}},{"type":"Feature","properties":{"resourceCoords":[4764.0,4960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0356108,40.4836609]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0089/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p89","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0089/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0089/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7916.0 -0.0,0.0 5843.5,-0.0 5839.9,2578.2 6334.2,4295.2 5837.5,4298.6 5835.2,5980.9 6784.0,5982.7 6784.0,7916.0 -0.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0089/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04397297965126,40.48907195155521]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04089663776513,40.4871428211707]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04383563670036,40.48439342930203]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0469119785865,40.48632255968654]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0090/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p90","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0090/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0090/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1218.8,7817.6 -0.0,7817.1 -0.0,6157.1 490.1,6153.1 -0.0,4459.6 -0.0,1087.4 -0.0,1087.4 0.0,0.0 6784.0,-0.0 6784.0,7916.0 936.4,7916.0 1218.8,7817.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0090/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04060112028964,40.4880838240105]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.03748690936739,40.486125370566505]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04047053953057,40.483342095179225]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04358475045282,40.48530054862322]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0091/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p91","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0091/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0091/info.json","type":"ImageService2","height":7916,"width":6784},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"419.6,7449.6 275.2,7916.0 0.0,7916.0 0.0,-0.0 6784.0,0.0 6784.0,6447.8 6494.2,6322.9 6220.0,6364.7 5478.3,7065.8 4076.3,7841.5 4064.2,7649.8 2799.4,7798.9 419.6,7449.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0091/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.07930054368181,40.50162275124493]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.07582736143333,40.50703101098811]}},{"type":"Feature","properties":{"resourceCoords":[6784.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06758605396416,40.50392767434563]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.07105923621265,40.498519414602455]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0092/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p92","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0092/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0092/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2129.5,472.5 4535.3,369.1 5755.0,0.0 6000.0,1207.4 5997.9,3473.1 6662.0,7308.9 6013.1,7536.5 6071.9,7916.0 -0.0,7916.0 0.0,-0.0 1611.7,0.0 1804.6,1009.9 2040.0,964.9 2129.5,472.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0092/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.07325229389875,40.497779771310974]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06852423190371,40.50258499708638]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06119804190355,40.49835762022334]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06592610389859,40.49355239444793]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0093/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p93","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0093/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0093/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"784.4,4128.5 1585.5,2017.3 1763.6,980.5 3274.8,458.7 3914.5,0.0 4587.4,0.0 4664.3,75.6 4677.5,0.0 6780.0,0.0 6780.0,7916.0 5058.7,7916.0 5002.8,7693.3 4997.4,7671.8 3506.5,7357.2 3007.1,7463.5 2626.8,7409.9 2138.1,7226.0 1703.3,7229.6 833.5,7681.5 213.1,7916.0 54.8,7916.0 784.4,4128.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0093/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.07071889139333,40.50053570812352]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06850942387877,40.506330344529296]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0596741687057,40.504354981607996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06188363622026,40.49856034520222]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0094/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p94","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0094/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0094/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1404.6 815.1,1231.7 1384.1,867.6 2140.4,246.9 2564.3,153.8 3079.6,232.7 3462.0,206.7 3927.8,0.0 5448.7,0.0 5559.0,225.8 6780.0,0.0 6780.0,1942.8 6349.4,1922.4 6162.2,5877.1 6780.0,5906.4 6780.0,6678.6 5939.9,6671.6 5835.2,7621.4 228.6,7640.7 549.0,3578.0 0.0,3404.6 0.0,1404.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0094/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.06352608319297,40.49860870819787]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05979502520537,40.503938932927994]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05166822023129,40.500603057192876]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05539927821889,40.49527283246275]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0095/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p95","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0095/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0095/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6780.0,7916.0 0.0,7916.0 0.0,-0.0 6780.0,0.0 6780.0,7916.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0095/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05805843097536,40.50279030309849]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0560297490548,40.50538550728542]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05207272446204,40.503571792781614]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.0541014063826,40.50097658859469]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0096/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p96","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0096/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0096/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3708.9,7323.3 988.0,7046.6 949.8,4723.3 -0.0,4626.6 -0.0,-0.0 6780.0,0.0 6780.0,6685.2 6176.7,6743.4 6171.6,6795.6 3684.0,7028.4 3708.9,7323.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0096/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05081985690616,40.5040913328697]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04388412123488,40.50118678313426]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04831257692005,40.49498564749405]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05524831259133,40.49789019722949]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0097/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p97","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0097/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0097/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6276.6,7664.0 437.8,6785.5 897.7,247.2 6278.6,1226.8 6276.6,7664.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0097/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05416973316296,40.49841276295568]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05056322696531,40.49717371751534]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05245225983177,40.49394903779834]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05605876602942,40.49518808323868]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0098/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p98","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0098/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0098/info.json","type":"ImageService2","height":7916,"width":6780},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"513.3,0.0 5530.7,0.0 5381.4,771.9 5884.7,750.6 6647.4,7916.0 4581.7,7748.5 411.2,7057.5 513.3,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0098/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05125680960649,40.49709762924182]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04764213417832,40.495904073871195]}},{"type":"Feature","properties":{"resourceCoords":[6780.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.04946177854148,40.4926720277831]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7916.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-80.05307645396965,40.49386558315373]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0099/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Allegheny, Pennsylvania | 1906 | sanborn07493_002 p99","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"}],"created":"2026-09-21T04:31:25Z","modified":"2026-09-21T04:31:25Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0099/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0099/info.json","type":"ImageService2","height":7916,"width":6768},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4647.0,7245.6 -0.0,7290.7 -0.0,1484.6 6491.5,164.0 6468.0,3788.0 4639.4,3776.2 4647.0,7245.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd382m:g3824m:g3824am:g3824am_g07493190601:07493_01_1906-0099/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6468.0,3788.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0519333,40.4918902]}},{"type":"Feature","properties":{"resourceCoords":[208.0,7288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-80.0560243,40.4927319]}}]}}]}