{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01701_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alton, Illinois | 1902 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"37"},{"label":"placed","value":"21"},{"label":"unplaced","value":"16"},{"label":"fit sources","value":"georef 10, georef-snap 9, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 23 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 38.89148,-90.16610 +/-283m); p13 (tier 1, 38.88705,-90.16516 +/-269m); p14__1 (tier 1, 38.89746,-90.18122 +/-287m); p14__3 (tier 2, 38.88915,-90.15865 +/-100m); p16__1 (tier 3, 38.89443,-90.17108 +/-1138m); p16__4 (tier 1, 38.88902,-90.16158 +/-100m); p17__1 (tier 1, 38.90182,-90.18541 +/-110m); p17__2 (tier 1, 38.89858,-90.18757 +/-108m); p18__3 (tier 1, 38.89790,-90.18949 +/-100m); p18__4 (tier 1, 38.89103,-90.17013 +/-100m); p18__5 (tier 1, 38.88865,-90.16826 +/-114m); p19__1 (tier 4, 38.89297,-90.17616 +/-2648m); p19__2 (tier 4, 38.89297,-90.17616 +/-2648m); p19__3 (tier 4, 38.89297,-90.17616 +/-2648m); p19__4 (tier 4, 38.89297,-90.17616 +/-2648m); p19__5 (tier 4, 38.89297,-90.17616 +/-2648m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0010/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"108.4,7325.5 67.9,0.0 6452.0,0.0 6452.0,3237.1 5665.2,3086.1 4784.2,7564.7 2761.9,7198.7 108.4,7325.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17645970046489,38.89554949609915]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17255050907812,38.89523527543232]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17302595556774,38.891601306256376]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.1769351469545,38.89191552692321]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0011/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 6452.0,0.0 6452.0,342.7 6278.0,342.4 6304.1,7652.0 120.1,7652.0 121.7,7395.0 -0.0,7396.4 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18032766821813,38.89602503771379]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17628797067414,38.89570561426508]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17677129826265,38.89195039531079]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18081099580664,38.8922698187595]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p12","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0012/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1041.0,0.0 6452.0,0.0 6452.0,561.4 4966.7,561.1 4963.3,1707.3 6452.0,1705.4 6452.0,5769.8 4799.3,5751.1 4781.1,7368.0 273.5,7323.6 346.0,524.4 1137.5,535.6 1041.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0012/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2548.0,2800.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.172301,38.892466]}},{"type":"Feature","properties":{"resourceCoords":[2548.0,5084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.17269,38.891412]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0014__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p14 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"4186.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2265.6"},{"label":"split_canvas_h","value":"2184.4"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0014__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0014/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,0.0 4188.0,0.0 4186.4,2184.4 4741.2,2182.4 6452.0,2177.2 6452.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0014__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4410.2,280.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.181076,38.897563]}},{"type":"Feature","properties":{"resourceCoords":[6108.4,280.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.180011,38.897478]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0015/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1542.8,7652.0 1534.8,4984.1 -0.0,4996.4 -0.0,3821.4 1531.3,3811.7 1529.6,3236.3 -0.0,3246.6 -0.0,-0.0 6452.0,0.0 6452.0,7652.0 1542.8,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.1698440190473,38.89489783596027]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16614084225151,38.89404879994758]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16742551354854,38.89060633329049]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17112869034433,38.89145536930318]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p16 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3733.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2718.4"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4276.0,7652.0 6452.0,7652.0 6452.0,0.0 4580.4,0.0 4574.0,2537.2 3785.2,2594.8 3766.7,4356.8 3791.7,7652.0 4276.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3733.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16279692753054,38.88820775912814]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16267190062925,38.889532096762764]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15789039742359,38.88925803411333]}},{"type":"Feature","properties":{"resourceCoords":[3733.6,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15801542432487,38.88793369647871]}},{"type":"Feature","properties":{"resourceCoords":[4477.2,3852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.160355,38.888432]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p16 [3]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2594.8"},{"label":"split_canvas_w","value":"3785.2"},{"label":"split_canvas_h","value":"2131.2"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2405.7,3475.8 0.0,3664.6 0.0,4722.4 3762.8,4726.0 3785.2,2594.8 2380.0,2624.4 2405.7,3475.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0016__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,2594.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15874190406069,38.8882418198526]}},{"type":"Feature","properties":{"resourceCoords":[3785.2,2594.8],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.157548998149,38.88814419640728]}},{"type":"Feature","properties":{"resourceCoords":[3785.2,4726.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15761916760907,38.88761734962503]}},{"type":"Feature","properties":{"resourceCoords":[0.0,4726.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15881207352076,38.88771497307035]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p17 [3]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"2930.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3521.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7439.4 6452.0,0.0 4367.2,0.0 4374.4,2013.2 2930.4,3339.6 2930.7,6755.2 3460.1,7340.5 6452.0,7439.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4533.3,5560.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.1868063,38.897163]}},{"type":"Feature","properties":{"resourceCoords":[5460.7,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.1860979,38.8988638]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p17 [4]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2724.0"},{"label":"split_canvas_w","value":"2930.8"},{"label":"split_canvas_h","value":"4928.0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__4/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 2564.0,7652.0 2930.8,7652.0 2930.4,3339.6 2193.6,3339.2 1230.0,3339.2 0.0,2724.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0017__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1991.2,4422.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.185284,38.902251]}},{"type":"Feature","properties":{"resourceCoords":[1991.2,6365.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.18527,38.901346]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p18 [1]","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":"6452.0"},{"label":"split_canvas_h","value":"2649.6"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"948.9,2639.1 4798.4,2585.2 6452.0,2564.8 6452.0,0.0 805.7,0.0 830.1,2455.1 947.7,2454.9 948.9,2639.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__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":[-90.16952294977139,38.88964890427808]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16570525372899,38.88872499626127]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,2649.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.16618899582643,38.88749681223671]}},{"type":"Feature","properties":{"resourceCoords":[0.0,2649.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17000669186883,38.88842072025353]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p18 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2585.2"},{"label":"split_canvas_w","value":"4798.8"},{"label":"split_canvas_h","value":"1869.2"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.9,4114.9 4694.8,4114.9 4695.5,3920.3 4798.7,3921.4 4798.4,2585.2 411.8,2646.6 411.9,4114.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0018__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[411.9,4114.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.171755,38.890062]}},{"type":"Feature","properties":{"resourceCoords":[4694.8,4114.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.169083,38.889439]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0020/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 -0.0,-0.0 6452.0,0.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15028227839899,38.90470958661258]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.14636940749467,38.90466147673666]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.14644221486316,38.90102470848267]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.15035508576747,38.90107281835859]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p2 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4393.4,4591.6 5832.9,3881.1 5085.0,2417.1 6152.8,1935.4 5237.8,-0.0 3561.4,-0.0 3304.9,780.0 1001.0,-0.0 -0.0,-0.0 -0.0,7652.0 4926.8,7652.0 4704.4,7007.6 3740.0,5081.2 4456.0,4715.0 4393.4,4591.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4952.0,2160.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.189119,38.893494]}},{"type":"Feature","properties":{"resourceCoords":[1092.0,6552.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.192532,38.892682]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p2 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"3740.0"},{"label":"split_canvas_y","value":"3796.4"},{"label":"split_canvas_w","value":"2712.0"},{"label":"split_canvas_h","value":"3855.6"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6013.1,5994.3 6452.0,6010.0 6452.0,5147.1 5941.2,3955.3 3740.0,5081.2 4275.0,6150.0 4283.0,5932.6 4760.5,5946.6 5874.6,6369.1 6013.1,5994.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[3740.0,3796.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.1902690238365,38.89767855160437]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,3796.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18731000038645,38.89636828283637]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18969741210832,38.89309490608586]}},{"type":"Feature","properties":{"resourceCoords":[3740.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.19265643555838,38.89440517485386]}},{"type":"Feature","properties":{"resourceCoords":[4762.5,5948.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.190487,38.89536]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0003/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 -0.0,4944.9 445.3,5168.6 1586.7,2931.1 1583.7,2362.0 -0.0,2365.1 -0.0,1591.7 1579.7,1606.6 1574.6,0.0 2699.6,0.0 2847.6,1015.8 4471.5,1060.7 4478.3,704.9 6136.1,746.4 6096.6,6262.6 6452.0,6867.1 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.19010608754127,38.893421759165946]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18611972801695,38.89315753465456]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18651951845375,38.889451765415984]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.19050587797807,38.88971598992737]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p4","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0004/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"446.1,0.0 2425.9,0.0 2423.7,198.5 3397.2,186.9 3397.4,0.0 6452.0,0.0 6452.0,164.2 5892.0,156.0 5891.7,806.8 5892.9,1869.0 6452.0,1863.1 6452.0,7652.0 -0.0,7652.0 -0.0,6973.2 940.0,6949.4 919.7,6183.4 559.7,5602.3 446.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[536.0,3640.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.1865434,38.8911115]}},{"type":"Feature","properties":{"resourceCoords":[5892.0,156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.182893,38.892542]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0005/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,6692.0 -0.0,-0.0 466.1,0.0 778.9,232.4 3623.6,201.7 3615.0,0.0 6452.0,0.0 6452.0,7252.3 5449.5,7266.7 5451.5,7063.7 3412.6,7068.8 3422.3,7292.3 1766.6,7296.6 1769.7,7652.0 147.8,7652.0 -0.0,6692.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18795958322644,38.89652275210072]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18397765121598,38.89617156797348]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18450904051505,38.89247007337742]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18849097252551,38.89282125750466]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0006/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"594.4,61.7 4041.1,0.0 4053.5,6689.4 3909.8,6693.0 3908.9,7305.2 6452.0,7308.7 6452.0,7652.0 1128.6,7581.9 1152.8,1775.4 588.2,1779.9 594.4,61.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18326308994425,38.892603922104634]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17920052510752,38.892262223682636]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17971753261482,38.888485565893646]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18378009745155,38.888827264315644]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0007/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.2,502.7 6355.6,454.4 6355.3,233.4 6452.0,228.1 6452.0,7652.0 -0.0,7652.0 -0.0,7031.3 145.8,7027.3 124.2,502.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18077893161872,38.892515075545504]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17677339496235,38.89217374079103]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17728985159577,38.88845009325417]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.18129538825214,38.888791428008645]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0008/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2469.1,367.3 4455.1,542.2 4254.7,2743.1 6284.0,2933.6 5812.5,7652.0 604.3,7652.0 12.3,710.6 2469.1,367.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17671062685864,38.89240721515031]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17273513975601,38.891797039784414]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.17365836209028,38.88810131244962]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.1776338491929,38.88871148781551]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alton, Illinois | 1902 | sanborn01701_004 p9","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-23T11:17:21Z","modified":"2026-09-23T11:17:21Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0009/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,442.1 6336.0,440.0 6452.0,7652.0 -0.0,7652.0 -0.0,442.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104am:g017011902:01701_1902-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2216.0,440.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.171755,38.890062]}},{"type":"Feature","properties":{"resourceCoords":[6336.0,440.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.169083,38.889439]}}]}}]}