{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn09056_008.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Petersburg, Virginia | 1957 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"124"},{"label":"placed","value":"79"},{"label":"unplaced","value":"45"},{"label":"fit sources","value":"georef 43, georef-snap 36, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"20 sheet(s) cut into 56 panels"},{"label":"unplaced pages","value":"p0a (tier 4, 37.22376,-77.40707 +/-3850m); p0b (tier 4, 37.22376,-77.40707 +/-3850m); p11__2 (tier 4, 37.22376,-77.40707 +/-3850m); p13__2 (tier 1, 37.22781,-77.42354 +/-112m); p16__2 (tier 1, 37.20626,-77.38424 +/-191m); p200__1 (tier 4, 37.22376,-77.40707 +/-3850m); p201 (tier 2, 37.24534,-77.40572 +/-163m); p203 (tier 4, 37.22376,-77.40707 +/-3850m); p205 (tier 2, 37.24772,-77.41229 +/-100m); p206__2 (tier 1, 37.23867,-77.41578 +/-100m); p206__3 (tier 1, 37.23871,-77.41618 +/-100m); p207__1 (tier 2, 37.23370,-77.41874 +/-294m); p207__2 (tier 2, 37.23370,-77.41874 +/-294m); p208 (tier 1, 37.23388,-77.42255 +/-287m); p209__1 (tier 1, 37.23641,-77.42492 +/-122m); p209__3 (tier 3, 37.23564,-77.42265 +/-682m); p21 (tier 2, 37.22949,-77.40781 +/-616m); p23 (tier 2, 37.22445,-77.42308 +/-178m); p33 (tier 1, 37.22272,-77.42279 +/-275m); p35__1 (tier 1, 37.21763,-77.41016 +/-267m); p35__2 (tier 2, 37.22069,-77.40804 +/-900m); p39__2 (tier 1, 37.22035,-77.40866 +/-100m); p3__2 (tier 2, 37.23370,-77.40493 +/-181m); p43__1 (tier 1, 37.23696,-77.39884 +/-100m); p43__3 (tier 1, 37.23762,-77.40073 +/-100m); p44__2 (tier 2, 37.22122,-77.42698 +/-100m); p47__1 (tier 2, 37.21867,-77.42120 +/-345m); p47__2 (tier 2, 37.21867,-77.42120 +/-345m); p60__2 (tier 2, 37.20047,-77.39815 +/-493m); p61 (tier 3, 37.23131,-77.41114 +/-682m); p62__2 (tier 1, 37.23745,-77.36782 +/-224m); p66__10 (tier 1, 37.21614,-77.43129 +/-100m); p66__11 (tier 2, 37.21906,-77.43699 +/-100m); p66__12 (tier 1, 37.21837,-77.43810 +/-100m); p66__13 (tier 2, 37.21906,-77.43699 +/-100m); p66__2 (tier 1, 37.22026,-77.43045 +/-147m); p66__3 (tier 2, 37.21906,-77.43699 +/-100m); p66__4 (tier 2, 37.21906,-77.43699 +/-100m); p66__5 (tier 1, 37.21370,-77.43234 +/-100m); p66__6 (tier 1, 37.21622,-77.44438 +/-100m); p66__7 (tier 1, 37.22063,-77.42802 +/-100m); p66__8 (tier 1, 37.21992,-77.43785 +/-100m); p66__9 (tier 1, 37.21932,-77.43008 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0001","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,710.7 -0.0,-0.0 1088.0,0.0 1088.0,1350.0 76.6,1350.0 75.4,1323.2 183.0,1330.3 144.9,699.0 -0.0,710.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41114032542619,37.23407277491959]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40735365417416,37.23455610987828]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40660568253921,37.230788807947356]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41039235379124,37.23030547298867]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"15"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0010/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0010","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"93.5,1042.5 12.4,80.6 396.5,78.6 423.4,1034.5 93.5,1042.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[462.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4013833,37.2266779]}},{"type":"Feature","properties":{"resourceCoords":[1045.0,68.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3997208,37.228437]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0011__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p11 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0011__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0011","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"623.7,917.7 624.9,1198.6 581.8,1260.0 1013.0,1263.0 1018.6,690.8 956.5,758.0 921.8,707.0 953.1,118.8 330.1,39.0 325.9,109.1 329.1,329.8 330.3,413.4 331.0,464.9 331.2,477.3 329.2,464.7 323.0,427.4 306.8,328.6 301.8,328.3 298.7,328.2 196.0,323.6 199.0,923.8 623.7,917.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0011__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[195.0,566.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.40835,37.223727]}},{"type":"Feature","properties":{"resourceCoords":[1013.0,1263.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4049364,37.222481]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p12 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2433.6"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2966.4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"46.7,1238.2 1047.1,1257.9 1037.5,710.5 518.0,710.9 518.1,613.6 103.8,609.5 51.1,662.4 46.7,1238.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[518.0,710.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.403857,37.224237]}},{"type":"Feature","properties":{"resourceCoords":[518.0,1251.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.40335,37.222799]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p12 [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":"4352.0"},{"label":"split_canvas_h","value":"2477.6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"423.0,58.5 425.0,-0.0 44.9,-0.0 80.8,609.2 1009.2,618.6 1088.0,547.4 1088.0,408.0 1088.0,294.0 1088.0,94.2 1018.0,58.5 423.0,58.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[423.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4010067,37.2252408]}},{"type":"Feature","properties":{"resourceCoords":[1018.0,58.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3990063,37.2256202]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p13 [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":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0013__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0013","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,0.0 524.0,0.0 466.9,198.5 479.9,408.0 276.0,467.4 0.0,465.1 -0.0,1350.0 962.1,1350.0 960.1,1198.2 1088.0,1196.0 1088.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0013__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":[-77.42761133378885,37.2284062409107]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42415524867742,37.2296641634711]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42220873497905,37.22622549254163]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42566482009047,37.22496756998123]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0014/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0014","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"255.4,1170.5 253.7,1350.0 -0.0,1350.0 -0.0,0.0 90.4,-0.0 69.9,79.7 510.9,193.4 505.5,97.9 516.6,41.8 623.2,122.9 619.6,137.4 730.1,282.6 836.4,309.3 836.9,423.0 1088.0,1239.3 1088.0,1350.0 926.4,1350.0 819.5,1176.1 255.4,1170.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41748215195769,37.23373822019324]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41426610152348,37.22820209688207]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42283299565301,37.22500235495418]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42604904608721,37.230538478265345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p15","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0015/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0015","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"569.9,1332.2 541.2,293.3 1088.0,285.4 1088.0,795.8 911.0,791.7 905.1,847.6 757.9,1150.0 960.2,1350.0 569.9,1332.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0015/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40023429989466,37.22921514359741]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39648496173557,37.229861914188625]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39548413541773,37.22613150986896]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39923347357683,37.22548473927774]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p16 [1]","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"18"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0016__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0016","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"677.0,1271.9 826.4,1281.5 817.0,791.3 1088.0,791.8 1088.0,473.0 1088.0,367.0 1088.0,-0.0 162.9,-0.0 18.6,189.2 -0.0,189.3 -0.0,861.7 76.5,806.0 46.0,927.7 62.9,984.5 114.4,1064.3 244.7,1104.4 236.4,1144.8 676.6,1232.2 677.0,1271.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0016__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[367.0,557.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.387645,37.205491]}},{"type":"Feature","properties":{"resourceCoords":[666.0,184.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.384385,37.205476]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p17","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0017/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0017","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"307.4,877.1 189.1,883.9 -0.0,944.2 0.0,-0.0 1088.0,0.0 1088.0,96.6 995.6,99.8 1021.1,833.6 1064.5,830.9 1088.0,1248.8 145.1,1263.4 307.4,877.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0017/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4177814485553,37.23319380134794]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.414169040882,37.233731459788395]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41333701433427,37.230137478706865]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41694942200758,37.22959982026641]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p18","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0018/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0018","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,1350.0 337.6,1255.0 61.5,1133.4 42.9,721.4 -0.0,722.5 -0.0,-0.0 981.2,0.0 938.8,703.5 1088.0,700.5 1088.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0018/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41441417733,37.23342018662349]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41076904525058,37.234068171930566]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40976628261194,37.23044165232533]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41341141469137,37.22979366701826]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0019/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0019","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.2,782.7 -0.0,746.0 85.8,490.2 -0.0,512.1 -0.0,289.5 231.4,0.0 261.8,0.0 207.4,127.2 953.6,120.3 970.9,1348.2 376.5,1350.0 366.4,1234.3 184.9,1228.5 242.2,782.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41730585684736,37.230139085071194]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41362298546126,37.23070646222093]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41274500366038,37.22704223306241]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41642787504648,37.22647485591268]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0002","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 1088.0,0.0 1088.0,730.0 951.0,799.3 940.1,1121.7 956.9,1175.7 -0.0,1169.2 0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[280.0,1171.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.399889,37.232109]}},{"type":"Feature","properties":{"resourceCoords":[280.0,909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.39996,37.232845]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p20","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0020/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0020","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,138.4 430.3,140.6 457.8,254.9 1088.0,58.1 1088.0,1171.5 -0.0,1350.0 -0.0,138.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0020/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41409757423843,37.23068956096678]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41037507316891,37.23130670401591]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40942007493854,37.22760307180506]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41314257600806,37.22698592875594]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0200__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p200 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"2832.8"},{"label":"split_canvas_y","value":"3700.4"},{"label":"split_canvas_w","value":"1519.2"},{"label":"split_canvas_h","value":"1699.6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0200__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0200","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,1350.0 1088.0,925.1 708.2,926.7 717.4,1350.0 1088.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0200__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[708.2,925.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40746106423136,37.24604125596133]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,925.1],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40621127409365,37.24644699089426]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40564148182648,37.245333789836614]}},{"type":"Feature","properties":{"resourceCoords":[708.2,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40689127196418,37.24492805490368]}},{"type":"Feature","properties":{"resourceCoords":[1106.0,991.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.406063,37.246292]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0202/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p202","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0202/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0202","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 885.2,0.0 686.4,75.2 789.6,82.7 954.6,433.3 976.6,510.0 1039.4,1142.8 1088.0,1124.4 1088.0,1328.5 1072.7,1350.0 235.3,1350.0 -0.0,1301.2 -0.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0202/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[126.0,394.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.411464,37.23921]}},{"type":"Feature","properties":{"resourceCoords":[37.0,28.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.412965,37.240947]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p204","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"10"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0204/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0204","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"493.3,1015.3 440.7,1008.3 194.2,1027.2 194.2,1026.3 42.1,1038.2 -0.0,1129.2 -0.0,0.0 1088.0,-0.0 1088.0,1175.3 582.5,1039.3 577.8,1050.2 493.3,1015.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0204/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[483.0,846.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.404716,37.240995]}},{"type":"Feature","properties":{"resourceCoords":[498.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.400598,37.243787]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0206__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p206 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0206__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0206","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 1088.0,1350.0 1088.0,1245.2 -0.0,1041.8 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0206__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[868.0,1066.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.406036,37.242427]}},{"type":"Feature","properties":{"resourceCoords":[345.0,1145.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.409831,37.241037]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0209__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p209 [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":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0209__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0209","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,0.0 441.5,0.0 441.5,646.7 441.5,756.6 263.2,759.8 260.5,647.0 0.0,647.3 -0.0,1210.0 0.0,1236.6 -0.0,1350.0 1088.0,1350.0 1088.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0209__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[548.0,551.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.42495,37.236923]}},{"type":"Feature","properties":{"resourceCoords":[548.0,952.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.422995,37.235223]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p22","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0022/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0022","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1183.6 -0.0,149.2 169.9,121.2 171.9,0.0 839.9,0.0 838.4,103.5 889.0,103.0 896.2,1240.0 -0.0,1183.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0022/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[297.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.409128,37.228218]}},{"type":"Feature","properties":{"resourceCoords":[889.0,103.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.407113,37.228576]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p24","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0024/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0024","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"987.3,1350.0 -0.0,1350.0 -0.0,1204.3 230.7,1204.6 209.3,0.0 937.2,0.0 937.8,119.9 1004.0,119.8 987.3,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0024/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42413715586575,37.222500535330354]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4206807241797,37.223786352579445]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41869119253691,37.220347083773504]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42214762422296,37.21906126652441]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0025/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0025","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1016.8,1268.6 -0.0,1263.3 -0.0,19.1 1034.1,19.5 1016.8,1268.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42286218959283,37.22651281661361]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41941520848641,37.22781183086964]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41740514693032,37.22438215396406]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42085212803674,37.223083139708024]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p26","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0026/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0026","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.1,0.0 976.7,0.0 834.0,220.9 1055.0,318.6 891.0,731.9 1063.5,781.9 1046.4,895.6 1088.0,906.1 1088.0,1021.5 1028.0,1017.8 985.1,1302.3 39.9,1279.5 58.1,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0026/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41977620618707,37.227691223638985]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4163459284029,37.22898575057161]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41434277862102,37.22557274731083]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41777305640518,37.2242782203782]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0027/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0027","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"73.7,1184.0 79.7,117.6 1030.6,110.9 1026.3,1175.4 73.7,1184.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42119537535199,37.22358975291343]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41772986365773,37.2248539970601]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41577368045722,37.22140574867397]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41923919215148,37.220141504527305]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0028/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p28","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0028/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0028","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"90.9,1191.4 91.5,120.9 1038.2,128.2 901.2,1198.5 90.9,1191.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0028/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41821502130972,37.22470672522935]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41476334666022,37.22595436481612]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41283282696445,37.22251993608544]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41628450161394,37.221272296498675]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0029/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p29","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0029/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0029","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"225.3,1115.4 210.7,319.6 273.6,313.4 255.2,199.6 877.4,253.1 832.1,1210.0 479.2,1176.8 225.3,1115.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0029/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41604849656201,37.22703442203144]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41240268521692,37.22787341055285]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41110445265376,37.22424591023474]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41475026399885,37.22340692171333]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0030/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p30","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0030/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0030","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1244.2 -0.0,303.9 823.0,178.5 811.2,1187.2 -0.0,1244.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0030/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[649.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.410339,37.226547]}},{"type":"Feature","properties":{"resourceCoords":[445.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.41105,37.226414]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0031/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p31","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0031/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0031","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"121.2,650.6 124.8,81.6 393.4,149.9 679.7,186.9 670.1,1025.8 793.6,1073.8 989.1,1091.6 983.7,1350.0 -0.0,1350.0 -0.0,649.5 121.2,650.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0031/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[417.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.412672,37.222988]}},{"type":"Feature","properties":{"resourceCoords":[124.0,206.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.414095,37.22388]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0032/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0032","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"994.0,1098.0 318.2,1094.5 123.4,1078.3 -0.0,1031.7 -0.0,201.6 729.8,183.2 1001.7,208.2 994.0,1098.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41245782240699,37.224934248725916]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40878967271924,37.225816706521854]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40742421321083,37.22216688259254]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41109236289859,37.2212844247966]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p34","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0034/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0034","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"973.0,519.9 966.3,1323.6 449.6,1318.2 435.7,1350.0 -0.0,1350.0 -0.0,89.2 1088.0,78.8 1088.0,355.8 973.0,519.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41036554993002,37.222475746522335]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40665183221368,37.2233262841862]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4053266755051,37.21965646263971]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40904039322143,37.21880592497585]}},{"type":"Feature","properties":{"resourceCoords":[973.0,520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.406534,37.221823]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p36","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0036/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0036","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1037.4,1252.0 -0.0,1257.8 -0.0,301.7 431.9,270.8 443.7,237.6 970.6,205.5 1037.4,1252.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0036/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40921548496274,37.21963792921767]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40551537647802,37.220260589085754]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40455198221969,37.216578697254626]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40825209070441,37.21595603738654]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0037/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0037","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"47.8,226.9 121.2,121.1 1026.7,139.6 1029.3,1066.8 555.0,1068.4 555.2,1350.0 44.6,1350.0 47.8,226.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40690793006092,37.22239406841054]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4032773395634,37.22321918453647]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40200065159836,37.219606605782765]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40563124209588,37.218781489656834]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p38","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0038/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0038","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"868.3,1165.2 26.1,1163.4 37.3,278.8 542.8,280.5 544.6,0.0 1014.4,0.0 1006.9,888.2 868.3,1165.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[543.0,631.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.403437,37.218263]}},{"type":"Feature","properties":{"resourceCoords":[36.0,360.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.405408,37.218598]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0039__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p39 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0039__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0039","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,487.7 678.3,485.7 678.1,0.0 590.2,0.0 591.3,72.0 69.0,64.0 69.0,1241.0 611.5,1252.9 608.8,1094.3 1018.0,1108.2 1003.5,1350.0 1088.0,1350.0 1088.0,487.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0039__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[69.0,1241.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.402222,37.219629]}},{"type":"Feature","properties":{"resourceCoords":[69.0,64.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.40335,37.222799]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003B/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3B","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003B/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003B","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"213.8,0.0 912.9,0.0 905.1,211.6 1041.4,216.6 991.1,1260.1 1088.0,1264.7 1088.0,1350.0 288.7,1350.0 213.8,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003B/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1057.0,1141.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.405496,37.231779]}},{"type":"Feature","properties":{"resourceCoords":[109.0,275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4072039,37.2327893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003C/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3C","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003C/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003C","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"541.9,1350.0 -0.0,1350.0 -0.0,303.4 440.6,213.9 447.0,324.7 1025.2,318.7 1030.7,483.6 697.9,517.7 725.8,1195.3 515.0,1206.5 541.9,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003C/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40570636224652,37.23343464773686]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40387616113092,37.233513318841894]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40375441596751,37.231692477541735]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40558461708311,37.2316138064367]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003D/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3D","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"7"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003D/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003D","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003D/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[733.0,63.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.404736,37.23186]}},{"type":"Feature","properties":{"resourceCoords":[719.0,1197.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.404306,37.230352]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003E/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3E","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003E/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003E","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003E/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4056324858844,37.230141027836545]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40367679283887,37.230568113276554]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40301589717595,37.22862233969854]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40497159022148,37.22819525425853]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003F/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3F","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003F/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003F","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003F/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4029534536721,37.22912740562679]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40250496575061,37.22763365398102]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40481644300661,37.227187433736546]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4052649309281,37.228681185382314]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003G/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3G","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"7"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003G/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003G","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003G/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[946.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.403325,37.227789]}},{"type":"Feature","properties":{"resourceCoords":[83.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4047871,37.2275289]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003H/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3H","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"2"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003H/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003H","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003H/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[361.0,612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.403904,37.232627]}},{"type":"Feature","properties":{"resourceCoords":[905.0,612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4030359,37.232682]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p3 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2714.8"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2685.2"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1068.5,776.6 746.8,809.1 742.9,678.7 540.1,678.7 0.0,686.5 -0.0,1350.0 533.3,1246.8 538.1,1350.0 1073.5,1350.0 1068.5,776.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[783.0,776.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4045477,37.2338819]}},{"type":"Feature","properties":{"resourceCoords":[1068.0,776.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4040293,37.2339085]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p4","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0004","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 1088.0,0.0 1088.0,45.1 1007.2,43.6 986.9,1200.0 839.8,1197.5 -0.0,1169.2 -0.0,847.6 158.3,838.0 165.2,467.8 -0.0,479.2 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0004/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40477070166784,37.23519040029827]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40092279156293,37.23548362587477]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40046901360851,37.23165543909177]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40431692371342,37.23136221351527]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0040/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0040","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"630.5,1044.8 23.5,1001.0 71.7,896.9 73.7,270.6 616.9,284.6 614.3,126.8 1024.0,142.2 961.5,1181.2 631.2,1160.7 630.5,1044.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0040/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40273162796069,37.22030391445649]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.3990612929348,37.22114529396453]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39775947623238,37.21749306879038]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40142981125827,37.21665168928234]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0041/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0041","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1079.6,1068.2 62.1,1248.0 42.6,1082.0 44.0,651.5 12.9,379.4 267.4,369.4 257.0,119.0 1088.0,95.0 1088.0,1110.7 1079.6,1068.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0041/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40231498811522,37.23232315653425]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39850985197647,37.232456946004966]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39830281560648,37.22867116718806]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40210795174524,37.228537377717345]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p42","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0042/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0042","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,1202.1 333.9,1335.6 290.4,1114.2 292.0,100.0 1088.0,84.9 1088.0,1202.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0042/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39953383386015,37.23243396277812]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39572370022157,37.23257285513476]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39550876699334,37.22878210865784]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39931890063193,37.228643216301194]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0043__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p43 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0043__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0043","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"577.1,1153.8 592.5,1196.2 1088.0,1025.6 1088.0,0.0 351.3,0.0 325.7,0.0 325.2,79.1 318.4,498.7 0.0,496.7 -0.0,1350.0 577.1,1153.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0043__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[325.0,865.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.401535,37.236461]}},{"type":"Feature","properties":{"resourceCoords":[929.0,865.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.399444,37.236027]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0044__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p44 [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":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0044__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0044","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1010.4,-0.0 -0.0,0.0 0.0,295.5 -0.0,1350.0 170.0,1350.0 360.0,1350.0 893.5,1350.0 895.5,1291.8 999.4,1309.5 1010.4,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0044__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":[-77.42477157313502,37.224976592721255]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42317910768321,37.222245514133085]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42740497193495,37.220660991595466]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42899743738676,37.22339207018364]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0045/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0045","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 -0.0,896.4 83.5,31.1 -0.0,21.2 -0.0,-0.0 759.1,0.0 745.5,101.0 1088.0,96.1 1088.0,1350.0 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4300006079852,37.22036141704046]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42642318655508,37.22158113465204]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42453598197478,37.21802137920482]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42811340340491,37.21680166159324]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p46","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0046/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0046","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"18.3,-0.0 1088.0,-0.0 1088.0,981.6 19.0,943.0 18.3,-0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0046/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[712.0,447.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.423641,37.220137]}},{"type":"Feature","properties":{"resourceCoords":[19.0,939.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.426277,37.221332]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p48","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0048/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0048","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"124.8,102.7 931.7,92.7 888.5,435.2 1088.0,460.4 1088.0,1333.5 903.5,1223.1 586.5,1173.5 561.3,1350.0 528.8,1350.0 540.4,1248.3 -0.0,1186.7 -0.0,185.6 123.8,184.2 124.8,102.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0048/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[594.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.416223,37.22178]}},{"type":"Feature","properties":{"resourceCoords":[354.0,444.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.416756,37.219428]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p49","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0049/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0049","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1311.2 0.0,-0.0 1088.0,0.0 1088.0,245.0 1053.5,246.2 918.5,395.9 1062.8,863.1 1088.0,900.0 1088.0,1103.3 834.3,1228.4 825.0,1350.0 214.2,1350.0 124.8,1221.5 -0.0,1311.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0049/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[918.0,396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.413384,37.213964]}},{"type":"Feature","properties":{"resourceCoords":[940.0,1177.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.412045,37.210952]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0005/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0005","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"86.7,53.9 1088.0,74.8 1088.0,1350.0 -0.0,1317.2 -0.0,320.2 71.8,322.0 86.7,53.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40225671333789,37.2289233218328]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39843954577425,37.229670724160506]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39728299657327,37.225872843585144]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4011001641369,37.22512544125744]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0050/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0050","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"107.3,277.9 132.8,275.2 127.0,199.1 159.9,192.9 151.1,10.4 489.4,0.0 690.1,76.5 675.4,0.0 831.0,0.0 825.6,169.0 963.8,178.0 941.8,420.6 963.3,423.6 901.7,706.9 1088.0,717.4 1088.0,892.6 865.3,882.7 773.2,1333.6 955.3,1343.5 975.5,1242.7 1088.0,1248.6 1088.0,1350.0 -0.0,1350.0 -0.0,1014.0 181.2,908.2 169.7,758.3 149.0,732.4 15.6,395.6 107.3,277.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41413324317165,37.216069119572495]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40684437182382,37.217491873515876]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40464319471111,37.21023841986017]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41193206605894,37.20881566591679]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0051/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0051","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"327.3,842.0 321.3,671.1 137.9,668.7 186.2,389.8 165.1,387.8 176.5,150.3 551.7,144.9 557.3,214.8 973.6,180.8 1010.6,92.6 1088.0,93.8 1088.0,362.7 851.9,368.3 825.5,526.0 1088.0,527.1 1088.0,664.2 801.6,674.6 774.1,848.5 789.5,848.7 800.5,1318.6 692.5,1350.0 -0.0,1350.0 -0.0,1303.0 346.4,1288.2 342.1,1189.3 232.2,1188.2 216.6,1287.3 38.6,1285.2 109.7,841.7 327.3,842.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40881541538289,37.217013203870486]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40127813060879,37.218214077123704]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39942021581281,37.21071347637322]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40695750058691,37.209512603120004]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p52 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"870.4"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"4529.6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 1088.0,1350.0 1088.0,217.6 523.1,670.0 507.1,678.7 339.9,769.4 345.4,822.6 0.0,1085.4 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[486.0,965.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.41713,37.206347]}},{"type":"Feature","properties":{"resourceCoords":[72.0,1164.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.419513,37.205588]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p52 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"4341.6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,181.6 1078.6,173.7 1038.4,211.4 1002.5,222.0 882.9,192.8 857.8,163.1 857.2,46.6 818.2,41.8 745.9,38.1 744.8,135.8 444.0,131.1 441.0,83.9 257.6,83.7 252.5,304.3 60.0,305.0 35.5,433.9 249.4,439.2 246.8,549.4 241.1,554.9 13.2,555.4 -0.0,622.8 -0.0,1085.4 345.4,822.6 339.9,769.4 507.1,678.7 523.1,670.0 1088.0,217.6 1088.0,181.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0052__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[578.0,131.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.398349,37.217852]}},{"type":"Feature","properties":{"resourceCoords":[444.0,131.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.399483,37.217652]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0053/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0053","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.6,1134.7 98.1,734.2 140.3,731.2 112.2,347.6 299.9,345.6 295.8,0.0 919.2,0.0 966.3,123.5 1088.0,38.9 1088.0,1350.0 737.7,1350.0 735.4,1189.4 723.5,1179.8 674.6,1226.7 630.4,1240.2 481.9,1206.2 450.3,1170.0 447.5,1026.8 309.6,1018.0 309.9,1138.1 103.6,1134.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4006751978134,37.223974664565844]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39321312029092,37.225216908424585]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39129101989566,37.21779184285473]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39875309741814,37.21654959899599]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0054/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0054","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"301.6,810.9 190.5,813.5 249.4,644.2 -0.0,563.0 -0.0,533.6 54.8,377.1 1088.0,208.9 1088.0,1069.5 312.7,1197.3 301.6,810.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39892782811386,37.235105938450026]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39202139521267,37.2373191714811]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.38859633859423,37.23044812429243]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39550277149542,37.22823489126136]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0055/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p55","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"9"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0055/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0055","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,989.1 182.2,763.0 743.4,333.9 850.8,345.8 981.5,0.0 1088.0,0.0 1088.0,367.9 1088.0,372.1 1088.0,1299.8 -0.0,1298.4 -0.0,989.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0055/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[359.0,1155.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.396478,37.223918]}},{"type":"Feature","properties":{"resourceCoords":[951.0,616.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.394114,37.228066]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p56","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0056/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0056","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"153.6,363.7 295.4,370.5 293.9,112.2 1088.0,0.2 1088.0,1350.0 -0.0,1350.0 -0.0,1243.1 63.5,928.1 219.2,904.8 153.6,363.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0056/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39607166696862,37.2295808904666]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.38917696962321,37.23194178076902]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.38552367673734,37.225081904693326]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39241837408275,37.222721014390906]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0057/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0057","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1234.9 0.0,-0.0 329.9,0.0 1088.0,205.8 1088.0,798.1 1007.6,822.0 1088.0,1080.3 1088.0,1268.9 967.3,1308.9 911.0,1293.9 832.0,1246.8 -0.0,1234.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.4034813115902,37.20972664891813]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.396801455899,37.21250926631636]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39249671095335,37.205861390502854]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39917656664456,37.20307877310462]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p58","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"14"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0058/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0058","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.0,98.9 848.4,107.8 916.0,147.8 982.9,564.2 1088.0,564.6 1088.0,999.3 1050.3,1007.1 1062.8,1130.3 890.3,1145.4 889.8,1041.2 719.0,1076.3 718.5,1093.3 305.5,968.0 311.0,869.5 93.1,840.6 74.2,674.1 108.9,295.2 59.0,294.2 61.0,98.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0058/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[720.0,563.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.393654,37.203126]}},{"type":"Feature","properties":{"resourceCoords":[125.0,295.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.398247,37.202938]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0059/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p59","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"27"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0059/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0059","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"34.5,429.6 31.4,259.9 57.7,68.2 -0.0,58.9 -0.0,0.0 247.8,0.0 255.4,100.5 690.5,172.0 688.8,154.7 857.0,96.2 871.5,201.7 1044.3,163.2 1088.0,310.1 1088.0,1350.0 -0.0,1350.0 -0.0,1079.3 77.6,1052.2 64.7,1048.5 185.0,1011.2 138.9,620.1 34.5,429.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0059/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[415.0,548.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3928725,37.198024]}},{"type":"Feature","properties":{"resourceCoords":[404.0,965.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.39198,37.19584]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p6","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0006/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0006","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1060.3,417.6 1041.9,674.5 782.5,655.5 782.5,937.0 141.3,962.6 118.2,788.7 -0.0,794.7 -0.0,391.7 95.9,401.6 89.6,323.8 1060.3,417.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[782.0,656.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4022117,37.2312608]}},{"type":"Feature","properties":{"resourceCoords":[782.0,937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.402061,37.2305015]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p60 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"733.6"},{"label":"split_canvas_h","value":"1569.6"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,389.9 104.2,392.4 134.9,315.8 181.6,0.0 0.0,0.0 0.0,389.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[24.1,339.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.401375,37.201793]}},{"type":"Feature","properties":{"resourceCoords":[156.3,374.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.400383,37.202065]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p60 [3]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"1094.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3258.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"403.4,0.0 293.0,388.0 288.8,400.8 273.5,400.1 277.4,435.6 283.6,491.8 306.8,704.1 309.1,1350.0 772.0,1350.0 795.4,1256.6 995.0,1238.5 1008.1,1203.0 1048.8,832.4 992.1,615.9 1031.3,445.4 1088.0,300.1 1088.0,253.0 1050.3,236.5 1064.9,177.9 1088.0,183.7 1088.0,7.3 1041.3,232.6 578.9,30.2 529.8,157.7 480.7,147.7 511.4,0.0 403.4,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[331.5,345.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.400306,37.19718]}},{"type":"Feature","properties":{"resourceCoords":[995.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.393292,37.195177]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p60 [4]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1559.6"},{"label":"split_canvas_w","value":"1236.4"},{"label":"split_canvas_h","value":"3840.4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1175.0 249.2,1194.0 249.8,1247.5 308.7,1247.5 308.0,1051.4 266.8,1051.7 258.8,399.4 141.2,394.1 0.0,860.9 0.0,1175.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0060__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[204.1,1052.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.399935,37.203486]}},{"type":"Feature","properties":{"resourceCoords":[33.0,1251.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.400383,37.202065]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0062__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p62 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2429.6"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2970.4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0062__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0062","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,607.9 0.0,607.4 -0.0,1350.0 1088.0,1350.0 1088.0,607.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0062__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[915.0,1155.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.365588,37.238579]}},{"type":"Feature","properties":{"resourceCoords":[105.0,1155.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.371107,37.238046]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0066__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p66 [1]","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":"4352.0"},{"label":"split_canvas_h","value":"2406.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0066__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0066","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"918.9,0.0 0.0,0.0 0.0,600.6 65.0,600.7 613.1,601.1 918.9,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0066__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":[-77.420930181025,37.20922160261114]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41712372536206,37.20975177521769]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,601.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.41675599314722,37.2080772274686]}},{"type":"Feature","properties":{"resourceCoords":[0.0,601.5],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.42056244881016,37.20754705486205]}},{"type":"Feature","properties":{"resourceCoords":[83.0,139.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.420553,37.208875]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0067/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p67","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0067/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0067","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1049.4,1081.4 1043.0,1096.3 804.9,1099.5 807.7,1350.0 -0.0,1350.0 -0.0,-0.0 222.2,-0.0 217.7,255.7 308.5,256.9 310.1,187.7 851.4,177.8 853.0,264.3 876.7,264.6 880.2,295.1 1088.0,294.0 1088.0,517.0 905.1,520.0 929.3,745.3 1088.0,743.1 1088.0,969.6 992.3,970.4 1049.4,1081.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0067/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.43591874026603,37.2207583265478]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.43353242480322,37.214970897983235]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.44248670267052,37.21259628587513]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.44487301813334,37.218383714439696]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0068/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p68","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0068/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0068","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 -0.0,306.1 56.3,190.9 596.7,-0.0 1088.0,-0.0 1088.0,1350.0 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0068/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[303.0,751.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.438418,37.213563]}},{"type":"Feature","properties":{"resourceCoords":[303.0,974.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.439915,37.213151]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0007/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0007","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"50.2,550.8 -0.0,552.0 -0.0,-0.0 957.2,0.0 971.5,169.6 1088.0,170.8 1088.0,1045.3 61.8,1057.0 50.2,550.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40768203181223,37.230066054283064]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40394025502717,37.230693824830134]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40296881899972,37.226970984992455]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40671059578479,37.226343214445386]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0070/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p70","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0070/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0070","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"250.9,381.9 311.8,0.0 794.4,0.0 870.1,33.9 885.1,0.0 1088.0,0.0 1088.0,1075.0 1036.0,1044.8 1035.2,1026.5 374.7,1046.4 432.2,1119.7 329.7,1091.5 273.2,1103.3 229.2,1127.6 179.9,1164.5 145.2,1293.4 -0.0,1268.5 -0.0,841.4 67.9,864.8 176.7,847.0 205.4,667.0 167.7,393.5 250.9,381.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0070/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39722925955009,37.20945911882663]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39117139134821,37.2130548628138]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.38560869369982,37.20702603508405]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.3916665619017,37.20343029109688]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0072/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p72","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0072/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0072","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1350.0 -0.0,-0.0 50.5,0.0 105.8,254.5 372.1,199.5 355.9,0.0 858.6,0.0 868.4,106.9 1088.0,91.2 1088.0,1297.0 138.8,1092.6 96.3,1350.0 -0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0072/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40197697385896,37.20198879940515]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39846669506738,37.20313178878288]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.39669864026685,37.199637990484355]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40020891905843,37.19849500110662]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0073/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p73","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"22"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0073/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0073","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"176.8,1199.8 140.8,953.3 94.8,969.4 69.6,92.1 -0.0,91.8 0.0,-0.0 1088.0,0.0 1088.0,93.9 1043.8,98.3 1044.8,109.2 1088.0,110.0 1088.0,1350.0 302.4,1350.0 297.6,1184.3 176.8,1199.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0073/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[352.0,608.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.433533,37.216517]}},{"type":"Feature","properties":{"resourceCoords":[352.0,458.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.433846,37.217312]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p8 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"644.4,609.9 683.0,184.8 180.2,217.8 244.5,1085.7 663.3,1049.8 644.4,609.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[406.0,203.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.4030287,37.2303479]}},{"type":"Feature","properties":{"resourceCoords":[406.0,797.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.402753,37.228681]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p8 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"3076.0"},{"label":"split_canvas_y","value":"1324.8"},{"label":"split_canvas_w","value":"1276.0"},{"label":"split_canvas_h","value":"1526.4"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1088.0,712.8 1088.0,340.1 777.0,331.2 769.0,711.5 1088.0,712.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0008__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1040.2,379.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.399961,37.229186]}},{"type":"Feature","properties":{"resourceCoords":[1040.2,637.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.3997208,37.228437]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Petersburg, Virginia | 1957 | sanborn09056_008 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T17:15:52Z","modified":"2026-09-21T17:15:52Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0009/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0009","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"39.7,1257.4 3.7,1207.9 29.2,0.0 1016.5,39.6 1074.2,1212.0 561.6,1225.3 558.5,1117.3 151.1,1135.0 39.7,1257.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884pm:g3884pm_g090561957:09056_1957-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40682155301586,37.227197568074224]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40311532411025,37.22794628465414]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40195677395131,37.2242586779618]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.40566300285693,37.223509961381886]}}]}}]}