{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03603_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Frederick, Maryland | 1911 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"51"},{"label":"placed","value":"22"},{"label":"unplaced","value":"29"},{"label":"fit sources","value":"georef-snap 15, georef 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"11 sheet(s) cut into 31 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 39.41246,-77.40506 +/-243m); p12__1 (tier 1, 39.41304,-77.42428 +/-196m); p12__2 (tier 1, 39.41403,-77.42536 +/-201m); p12__3 (tier 1, 39.41311,-77.42587 +/-100m); p13__1 (tier 1, 39.41647,-77.40534 +/-100m); p13__2 (tier 2, 39.41565,-77.40937 +/-955m); p14__2 (tier 1, 39.41431,-77.41536 +/-100m); p15__1 (tier 1, 39.40970,-77.41962 +/-255m); p15__2 (tier 2, 39.41091,-77.41917 +/-201m); p20__1 (tier 1, 39.41957,-77.41738 +/-250m); p20__2 (tier 1, 39.42167,-77.41561 +/-100m); p26__1 (tier 1, 39.41148,-77.39759 +/-120m); p27__1 (tier 1, 39.41170,-77.40398 +/-101m); p27__2 (tier 1, 39.41164,-77.40350 +/-100m); p28__1 (tier 1, 39.40449,-77.39427 +/-100m); p28__2 (tier 1, 39.40416,-77.39431 +/-100m); p28__3 (tier 1, 39.40399,-77.39353 +/-100m); p28__4 (tier 1, 39.40451,-77.39375 +/-100m); p28__5 (tier 1, 39.40396,-77.39383 +/-100m); p29__1 (tier 1, 39.42166,-77.40674 +/-164m); p29__2 (tier 1, 39.42320,-77.40237 +/-100m); p29__3 (tier 1, 39.42394,-77.40524 +/-176m); p29__4 (tier 1, 39.42073,-77.40475 +/-118m); p30__1 (tier 4, 39.41515,-77.40978 +/-1388m); p30__2 (tier 4, 39.41515,-77.40978 +/-1388m); p30__3 (tier 4, 39.41515,-77.40978 +/-1388m); p31__1 (tier 4, 39.41515,-77.40978 +/-1388m); p31__2 (tier 4, 39.41515,-77.40978 +/-1388m); p31__3 (tier 4, 39.41515,-77.40978 +/-1388m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p10","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1367.2,300.4 1394.8,1649.5 186.8,1632.5 174.7,258.4 1367.2,300.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40703133099106,39.41426920292107]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40735536830508,39.41126010869147]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41194220602878,39.41155911382255]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41161816871477,39.414568208052145]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0011/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0011","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1438.8,317.8 1411.8,986.1 1537.1,988.0 1531.2,1843.5 104.5,1815.6 79.7,-0.0 1561.0,-0.0 1438.8,317.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40332925506472,39.41385040901514]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40370295213653,39.41085563016211]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40826794374699,39.41120046066394]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40789424667518,39.41419523951697]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0013__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p13 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2076.4"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5575.6"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0013__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0013","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1748.6 1330.2,1760.2 1318.6,926.5 1613.0,801.8 1613.0,573.5 1319.8,652.4 370.0,666.1 369.7,519.1 0.0,526.9 -0.0,1913.0 1613.0,1913.0 1613.0,1748.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0013__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,519.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42296906281437,39.41384786226028]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,519.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41910166174048,39.41347735296718]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41951630874112,39.41089630186389]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42338370981501,39.411266811157]}},{"type":"Feature","properties":{"resourceCoords":[1018.0,1770.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4208999,39.4112977]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p14 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"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":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0014__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0014","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1561.0,510.8 993.9,375.4 978.1,169.7 245.9,196.9 -0.0,138.2 -0.0,1913.0 407.3,1913.0 409.9,1625.5 682.4,1628.0 800.1,1913.0 1603.8,1909.2 1613.0,628.3 1564.7,630.5 1561.0,510.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[60.0,150.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4153284,39.4138255]}},{"type":"Feature","properties":{"resourceCoords":[1561.0,511.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.416656,39.411018]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0016/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0016","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,120.2 1613.0,1913.0 754.7,1913.0 756.6,1786.7 169.3,1620.0 118.8,78.8 768.2,95.0 768.7,71.3 1613.0,120.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41229749704046,39.41218059226481]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41256662995305,39.40920767178101]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41709819055129,39.40945602141146]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4168290576387,39.41242894189526]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0017","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1584.7,1913.0 1584.1,1883.8 751.1,1853.5 751.0,1876.9 110.8,1874.8 49.7,14.0 1613.0,39.0 1613.0,1889.9 1584.7,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40798156578971,39.41185604798915]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40833838159077,39.40884504917192]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41292796332795,39.40917431204215]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41257114752689,39.41218531085937]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p18","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"1"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0018","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.0,1836.0 125.2,987.0 -0.0,988.1 -0.0,350.0 127.6,6.2 1613.0,-0.0 1613.0,1820.2 138.0,1836.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4036392458096,39.411187286274114]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40410347064626,39.40819928069451]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4086924174494,39.408624446137495]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40822819261274,39.4116124517171]}},{"type":"Feature","properties":{"resourceCoords":[138.0,1836.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4080832,39.4113397]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0019","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"264.4,1913.0 318.3,82.5 454.2,90.1 459.2,-0.0 1613.0,-0.0 1613.0,1913.0 264.4,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40819084706025,39.40942525273111]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40842841832115,39.406471347447045]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41293082690808,39.4066905808725]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41269325564718,39.409644486156566]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 -0.0,1913.0 -0.0,1890.1 84.8,1891.4 139.4,723.5 122.1,46.8 1473.0,64.3 1481.8,1428.9 1370.9,1428.3 1366.3,1582.4 1613.0,1589.8 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41145216900695,39.41936889052705]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41181028272234,39.416416301595795]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41631131992567,39.41674672632622]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41595320621028,39.419699315257475]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p21","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0021/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0021","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1472.9,1913.0 -0.0,1913.0 -0.0,595.6 93.9,592.2 106.6,528.6 -0.0,508.6 -0.0,441.1 120.6,463.3 131.7,121.8 1482.8,93.6 1510.2,746.8 1472.9,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0021/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41098045204795,39.421882633514834]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41140038857996,39.41889326909912]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41595765055341,39.41928072272414]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4155377140214,39.42227008713985]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p22","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0022","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"148.4,349.9 1457.6,346.9 1478.1,1627.5 168.8,1640.3 148.4,349.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[808.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4101831,39.420343]}},{"type":"Feature","properties":{"resourceCoords":[1470.0,1126.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.410343,39.4190753]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0023/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0023","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.4,1839.0 132.8,254.1 203.6,255.6 205.0,-0.0 1490.2,12.9 1505.2,1849.7 144.4,1839.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40371201389135,39.42142966194538]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40404798682347,39.41845525599686]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40858241445147,39.418765242839854]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40824644151935,39.421739648788375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0024","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1499.4,1913.0 -0.0,1913.0 -0.0,0.0 1173.3,-0.0 1172.4,77.2 1565.9,92.9 1552.6,1615.3 1531.0,1784.4 1410.5,1757.7 1408.0,1825.5 1514.4,1849.5 1499.4,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40761033690453,39.42434431498112]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40788843863088,39.42136183823626]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41243535718539,39.421618419406194]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41215725545904,39.424600896151055]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0025","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1562.6,1866.7 1166.4,1859.2 1165.7,1781.5 -0.0,1805.9 -0.0,0.0 1613.0,-0.0 1613.0,276.4 1541.9,274.5 1562.6,1866.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40335443920584,39.424007336938594]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40371045636313,39.421048424885534]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40822143292819,39.421376893304014]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4078654157709,39.424335805357074]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0026__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p26 [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":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0026__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0026","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,-0.0 -0.0,-0.0 0.0,1150.1 901.7,1171.1 888.7,1913.0 1613.0,1913.0 1613.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0026__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":[-77.39497494130684,39.411641907472514]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39248492308998,39.40932690496792]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39604027901542,39.40704639428732]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39853029723228,39.409361396791915]}},{"type":"Feature","properties":{"resourceCoords":[1108.0,1789.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3965894,39.407919]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1466.8,337.9 1471.4,1649.0 153.3,1623.4 144.0,306.3 1466.8,337.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40764048365754,39.41917352189572]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40798236563255,39.41614616982115]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41259735832816,39.41646161894308]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41225547635315,39.41948897101766]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1493.2,1877.2 138.0,1848.9 117.3,-0.0 961.2,-0.0 952.8,293.2 1482.7,305.6 1493.2,1877.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40402784215556,39.418898681204695]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40437291468176,39.41594452106622]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40887631584418,39.41626291514807]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40853124331798,39.41921707528654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1723.2 -0.0,-0.0 154.3,0.0 157.0,111.0 1521.6,61.0 1548.7,1391.6 1072.0,1414.0 286.5,1782.8 298.1,1720.0 -0.0,1723.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4154786700201,39.417141243240195]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41169858675278,39.41677434120959]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41225788314416,39.413286387842426]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41603796641148,39.41365328987303]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p6","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"152.4,244.3 1458.6,256.7 1474.7,1582.3 158.9,1564.6 152.4,244.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[826.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.410827,39.4153627]}},{"type":"Feature","properties":{"resourceCoords":[152.0,1044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.410682,39.41661]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"143.4,159.2 1468.8,201.2 1462.0,1756.5 134.3,1729.6 143.4,159.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1458.0,1167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4076861,39.4139837]}},{"type":"Feature","properties":{"resourceCoords":[816.0,1167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4075667,39.4151525]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"937.6,1913.0 945.4,1824.4 54.2,1862.8 40.7,0.0 1613.0,0.0 1613.0,1913.0 937.6,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4050166634223,39.41721127467782]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40126112086136,39.41686093749342]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4017951667505,39.41339563179843]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40555070931144,39.41374596898283]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Frederick, Maryland | 1911 | sanborn03603_005 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T19:33:44Z","modified":"2026-09-22T19:33:44Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"170.1,93.8 1362.9,117.8 1429.5,1913.0 680.0,1913.0 492.6,1857.3 171.0,1080.2 170.1,93.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844fm:g3844fm_g036031911:03603_1911-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41072306453738,39.41448369331979]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41102780532914,39.4114348250922]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41567528721073,39.41171602342797]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41537054641897,39.41476489165556]}}]}}]}