{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn05757_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ballston Spa, New-York | 1904 | 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":"27"},{"label":"placed","value":"11"},{"label":"unplaced","value":"16"},{"label":"fit sources","value":"georef 8, georef-snap 2, snap:0 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"6 sheet(s) cut into 21 panels"},{"label":"unplaced pages","value":"p1 (tier 1, 43.00021,-73.85716 +/-100m); p11__1 (tier 1, 43.00462,-73.85690 +/-100m); p11__2 (tier 1, 43.00482,-73.85684 +/-112m); p11__3 (tier 1, 43.00346,-73.85700 +/-100m); p12__1 (tier 1, 43.00499,-73.84453 +/-145m); p12__2 (tier 1, 43.00467,-73.84689 +/-105m); p12__3 (tier 1, 43.00394,-73.84628 +/-121m); p12__4 (tier 1, 43.00539,-73.84553 +/-105m); p12__5 (tier 2, 43.00507,-73.84622 +/-100m); p12__6 (tier 1, 43.00553,-73.84556 +/-100m); p12__7 (tier 1, 43.00479,-73.84600 +/-100m); p2__1 (tier 1, 43.01155,-73.85893 +/-102m); p7__1 (tier 1, 43.00326,-73.85026 +/-100m); p7__2 (tier 1, 43.00385,-73.84999 +/-138m); p7__4 (tier 3, 43.00417,-73.85214 +/-578m); p7__5 (tier 3, 43.00417,-73.85214 +/-578m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p10","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0010","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"668.6,305.8 668.0,0.0 1613.0,0.0 1613.0,1913.0 176.5,1913.0 159.4,307.5 668.6,305.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0010/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84768790120468,43.00401335019635]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84341444253026,43.004293570699524]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84295988010284,43.00058806840236]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84723333877726,43.00030784789919]}},{"type":"Feature","properties":{"resourceCoords":[615.0,886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.845848,43.002404]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p2 [2]","metadata":[{"label":"streets","value":"4"},{"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":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1348.3,100.0 1209.9,-0.0 -0.0,0.0 0.0,1202.0 454.1,1201.6 619.1,1383.5 618.9,1913.0 1613.0,1913.0 1613.0,-0.0 1420.0,-0.0 1348.3,100.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1348.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.856414,43.010597]}},{"type":"Feature","properties":{"resourceCoords":[431.0,571.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.858894,43.011384]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p3 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4406.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3246.0"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1524.2,1787.8 1435.5,1739.4 1416.7,1632.3 1613.0,1634.9 1613.0,1152.2 1576.1,1101.5 -0.0,1101.5 -0.0,1365.8 58.7,1447.7 58.0,1617.2 180.2,1617.2 291.9,1773.0 96.3,1913.0 1042.8,1913.0 1045.0,1779.8 1524.2,1787.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[574.0,1617.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.855055,43.010662]}},{"type":"Feature","properties":{"resourceCoords":[58.0,1617.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.856414,43.010597]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p3 [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":"6452.0"},{"label":"split_canvas_h","value":"4406.0"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"69.6,253.9 115.8,296.4 209.9,769.5 15.6,805.2 55.0,906.5 1244.3,1070.1 1225.0,957.3 1613.0,924.1 1613.0,0.0 0.0,0.0 -0.0,267.7 69.6,253.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0003__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":[-73.85259898729527,43.01228603816631]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84840325719412,43.01188115147938]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1101.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84877889994108,43.00977028634303]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1101.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.85297463004223,43.01017517302996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p4 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"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":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1577.7,1781.6 1512.5,323.2 1125.3,202.6 1124.9,405.3 641.5,1532.9 0.0,1539.9 -0.0,1913.0 196.6,1913.0 692.1,1775.9 693.5,1810.8 1577.7,1781.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1514.0,210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.849739,43.010144]}},{"type":"Feature","properties":{"resourceCoords":[1552.0,1259.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.8495023,43.0081082]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p4 [2]","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":"4503.2"},{"label":"split_canvas_h","value":"6159.6"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"305.8,1493.0 710.6,1371.7 760.2,1256.0 1041.3,143.3 632.2,33.1 639.9,0.0 0.0,0.0 -0.0,871.5 418.4,967.5 305.8,1493.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0004__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[446.9,835.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.851504,43.005318]}},{"type":"Feature","properties":{"resourceCoords":[1041.8,143.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.8505534,43.0070029]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1264.6,1600.0 92.3,1639.4 106.8,48.8 493.9,105.0 518.4,0.0 1613.0,0.0 1613.0,1913.0 1262.4,1913.0 1264.6,1600.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.85002934328938,43.01021702983355]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84583637006432,43.01052428367701]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84534153921395,43.006862237210456]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.849534512439,43.006554983366996]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p6","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0006","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,0.0 1613.0,1913.0 1120.5,1913.0 1118.4,1680.9 829.9,1683.0 498.0,1814.5 -0.0,1850.2 40.1,1814.7 65.2,51.3 1613.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0006/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.85074498390863,43.00709422311089]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84632821238972,43.00739498667935]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.84584385900934,43.00353728151219]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-73.85026063052824,43.003236517943726]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0007__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p7 [3]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2830.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4822.0"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0007__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0007","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1530.0,1032.8 1132.2,1258.8 1124.3,711.0 727.7,713.8 937.1,1132.4 846.9,1177.9 781.0,1211.3 753.2,1155.1 535.3,715.3 527.0,715.4 0.0,719.0 -0.0,1913.0 1171.5,1913.0 1168.5,1747.0 1530.0,1572.9 1530.0,1032.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0007__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1530.0,1032.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.850309,43.00449]}},{"type":"Feature","properties":{"resourceCoords":[1530.0,1592.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.850171,43.003405]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p8","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0008/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0008","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1913.0 0.0,-0.0 1613.0,0.0 1613.0,586.4 1331.5,611.1 1436.1,1800.9 366.8,1903.3 357.9,1815.0 28.0,1850.8 34.0,1913.0 0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[779.0,1449.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.8519529,43.001459]}},{"type":"Feature","properties":{"resourceCoords":[813.0,1861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.850877,43.001528]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ballston Spa, New-York | 1904 | sanborn05757_004 p9","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"19"}],"created":"2026-09-22T07:53:01Z","modified":"2026-09-22T07:53:01Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0009","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"948.5,138.9 1304.6,0.0 1613.0,0.0 1613.0,1913.0 -0.0,1913.0 -0.0,1576.1 85.7,1575.7 83.5,313.1 459.1,135.5 415.9,173.5 948.5,138.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd380m:g3804m:g3804bm:g3804bm_g057571904:05757_1904-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[377.0,621.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.850261,43.002518]}},{"type":"Feature","properties":{"resourceCoords":[615.0,1576.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-73.8494061,43.000775]}}]}}]}