{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08968_009.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alexandria, Virginia | 1959 | mapsnap generated fit (2026-09-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-24"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"94"},{"label":"placed","value":"68"},{"label":"unplaced","value":"26"},{"label":"fit sources","value":"georef-snap 36, georef 36"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"11 sheet(s) cut into 24 panels"},{"label":"unplaced pages","value":"p0 (tier 3, 38.83525,-77.08044 +/-937m); p201 (tier 2, 38.82485,-77.09066 +/-100m); p202__2 (tier 1, 38.80340,-77.07389 +/-147m); p203 (tier 2, 38.78521,-77.06384 +/-100m); p205 (tier 4, 38.81468,-77.05993 +/-4243m); p206 (tier 4, 38.81468,-77.05993 +/-4243m); p207__1 (tier 2, 38.79187,-77.06643 +/-100m); p208__1 (tier 3, 38.77346,-77.05882 +/-937m); p208__2 (tier 3, 38.77346,-77.05882 +/-937m); p208__3 (tier 3, 38.77346,-77.05882 +/-937m); p210__1 (tier 2, 38.81561,-77.10743 +/-100m); p210__2 (tier 1, 38.82300,-77.11251 +/-100m); p211 (tier 4, 38.81468,-77.05993 +/-4243m); p212 (tier 1, 38.79909,-77.04778 +/-596m); p28 (tier 2, 38.81988,-77.04573 +/-364m); p29__1 (tier 1, 38.79813,-77.05214 +/-248m); p30__2 (tier 1, 38.79397,-77.05077 +/-170m); p31__1 (tier 2, 38.80869,-77.07097 +/-812m); p33__1 (tier 1, 38.80016,-77.05581 +/-192m); p33__3 (tier 2, 38.80624,-77.05506 +/-3638m); p59__2 (tier 2, 38.83788,-77.07937 +/-159m); p62__1 (tier 2, 38.83130,-77.07836 +/-667m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0001/info.json","type":"ImageService2","height":7796,"width":6736},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5920.9,1192.2 5831.2,5954.7 1574.1,5881.2 1697.6,1106.4 5920.9,1192.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05339055863672,38.80430944442672]}},{"type":"Feature","properties":{"resourceCoords":[6736.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05282774908963,38.807349304433565]}},{"type":"Feature","properties":{"resourceCoords":[6736.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04834465843781,38.80683812070338]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0489074679849,38.80379826069654]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0010/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p10","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0010/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0010/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"772.6,995.0 5878.8,1003.7 5892.0,4751.7 5011.3,4867.3 5892.3,4955.1 5898.6,6848.4 784.0,6866.4 772.6,995.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0010/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[760.0,4864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.047709,38.801636]}},{"type":"Feature","properties":{"resourceCoords":[3316.0,1004.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.049684,38.803073]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p11","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0011/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"771.3,1161.4 6612.0,1195.1 6612.0,6900.7 748.8,6856.1 771.3,1161.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0011/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3312.0,4996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.044115,38.802362]}},{"type":"Feature","properties":{"resourceCoords":[3312.0,6876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0430331,38.8022281]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0012/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p12","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0012/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0012/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"651.0,571.7 5794.0,611.8 5795.0,4594.6 6548.0,4599.5 6548.0,7796.0 0.0,7796.0 0.0,6860.1 794.7,6862.6 651.0,571.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0012/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04366471868512,38.80082953664955]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04306699733577,38.80376358630232]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03861593876927,38.803205078508434]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03921366011862,38.80027102885567]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0013/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p13","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0013/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0013/info.json","type":"ImageService2","height":7796,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6249.8,7792.4 -0.0,7791.7 -0.0,2604.3 617.0,2602.8 722.6,242.1 2465.1,249.9 2442.3,0.0 3429.6,0.0 3951.2,286.8 4396.7,0.0 6249.4,0.0 6249.8,7792.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0013/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[596.0,5136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.053668,38.800072]}},{"type":"Feature","properties":{"resourceCoords":[6264.0,5136.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.050406,38.799655]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0014/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p14","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0014/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0014/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6338.7,154.9 6294.2,7737.0 489.0,7759.3 510.4,141.5 6338.7,154.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0014/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05021784867728,38.80203516915098]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04641793189266,38.801551079106645]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04715229353287,38.79800035790484]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05095221031749,38.79848444794918]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0015/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p15","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0015/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0015/info.json","type":"ImageService2","height":7796,"width":6556},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6084.0,180.0 5948.7,7766.7 341.0,7685.6 478.2,101.4 6084.0,180.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0015/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2232.0,5116.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0459634,38.7990899]}},{"type":"Feature","properties":{"resourceCoords":[6084.0,180.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0432789,38.8010803]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0016/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p16","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0016/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0016/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"319.9,7752.1 356.3,161.1 6548.0,0.0 6548.0,7796.0 319.9,7752.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0016/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04347024847921,38.80118005178063]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03967404857787,38.800693993761726]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04041138675801,38.79714670304215]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04420758665935,38.79763276106105]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0017/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p17","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"13"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0017/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0017/info.json","type":"ImageService2","height":7796,"width":6556},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1807.3,869.2 1993.1,430.5 1777.4,0.0 3456.2,0.0 3457.3,0.0 4221.0,0.0 5650.3,1222.6 5903.0,1665.8 5974.2,2318.2 5870.1,7586.0 3180.6,7504.6 0.0,6061.0 0.0,843.8 1807.3,869.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0017/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5924.0,4796.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0570516,38.8075276]}},{"type":"Feature","properties":{"resourceCoords":[868.0,896.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.059718,38.80552]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0018/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p18","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"15"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0018/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0018/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"732.0,446.9 3193.7,1476.7 5815.3,1481.7 5779.8,0.0 6548.0,0.0 6548.0,3345.1 5825.2,3345.8 5845.3,7132.0 1595.3,7154.8 1569.7,7154.6 775.2,7151.7 732.0,446.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0018/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4160.0,1476.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.055618,38.806581]}},{"type":"Feature","properties":{"resourceCoords":[732.0,448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.056543,38.805128]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0019/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p19","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0019/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0019/info.json","type":"ImageService2","height":7796,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"98.4,3861.4 617.4,3847.9 528.3,0.0 2844.5,0.0 2844.1,162.8 3673.2,196.3 5523.8,991.4 5528.4,7580.5 4760.4,7576.4 4759.7,7796.0 0.0,7671.3 98.4,3861.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0019/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05764884621584,38.80267043260707]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05702013550649,38.8056918011307]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05246708329885,38.80510827381348]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0530957940082,38.802086905289855]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p2","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0002/info.json","type":"ImageService2","height":7796,"width":6584},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"733.0,0.0 5779.9,0.0 5772.8,2802.2 6094.7,2804.1 6086.7,4801.7 5764.9,4799.8 5771.0,5690.4 713.5,5657.4 715.5,4854.0 0.0,4730.5 716.5,4650.0 733.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[716.0,4752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.047219,38.8039385]}},{"type":"Feature","properties":{"resourceCoords":[3244.0,892.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0492023,38.8053503]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0020/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p20","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0020/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0020/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6337.0,7653.4 754.5,7701.3 735.8,2664.2 -0.0,2671.2 -0.0,161.8 6314.9,112.3 6320.0,2636.0 4459.7,2635.2 4476.0,5164.0 6333.4,5138.3 6337.0,7653.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0020/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4476.0,5164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0519663,38.8080343]}},{"type":"Feature","properties":{"resourceCoords":[6320.0,2636.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0506403,38.8090343]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0202__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p202 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6612.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0202__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0202/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,7796.0 3892.4,7796.0 4196.0,7796.0 5080.0,7796.0 6612.0,7796.0 6612.0,0.0 3790.8,0.0 1553.6,0.0 1543.2,2620.0 0.0,2592.8 0.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0202__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1932.0,4748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.084117,38.806921]}},{"type":"Feature","properties":{"resourceCoords":[2920.0,1820.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0872814,38.8082542]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0204/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p204","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0204/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0204/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6612.0,7796.0 -0.0,7796.0 -0.0,553.6 110.8,638.1 418.0,0.0 6612.0,0.0 6612.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0204/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06675851474425,38.79220570852946]}},{"type":"Feature","properties":{"resourceCoords":[6612.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0592591805448,38.7915867468083]}},{"type":"Feature","properties":{"resourceCoords":[6612.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06018890176527,38.78464591170441]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06768823596472,38.78526487342557]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0207__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p207 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6552.0"},{"label":"split_canvas_h","value":"4650.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0207__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0207/info.json","type":"ImageService2","height":7796,"width":6552},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,4068.8 4310.4,4052.0 6478.3,4630.3 6417.5,4503.4 6552.0,4532.0 6552.0,0.0 -0.0,-0.0 0.0,4068.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0207__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07043890476922,38.79821615170553]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06395937802822,38.79512053478498]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,4650.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06678051187752,38.791536283569904]}},{"type":"Feature","properties":{"resourceCoords":[0.0,4650.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07326003861853,38.79463190049046]}},{"type":"Feature","properties":{"resourceCoords":[1956.0,2011.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.069723,38.795741]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0209/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p209","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0209/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0209/info.json","type":"ImageService2","height":7796,"width":6552},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,394.7 0.0,-0.0 6552.0,0.0 6552.0,7796.0 0.0,7796.0 0.0,394.7 0.0,394.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0209/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.11428572762472,38.811716463481815]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.1115001251778,38.817103250513924]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.10333188747745,38.814502393618135]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.10611748992437,38.809115606586026]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0021/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p21","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0021/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0021/info.json","type":"ImageService2","height":7796,"width":6552},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6021.7,7682.8 362.9,7669.9 385.9,5114.2 -0.0,5117.6 -0.0,48.8 6057.6,70.2 6021.7,7682.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0021/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4156.0,2604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0479883,38.8110283]}},{"type":"Feature","properties":{"resourceCoords":[404.0,2604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0501453,38.8113003]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0213/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p213","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0213/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0213/info.json","type":"ImageService2","height":7796,"width":6616},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1360.0,7771.9 -0.0,7796.0 0.0,-0.0 6616.0,0.0 6616.0,7206.3 6224.0,7201.3 6207.4,5590.4 2226.1,5752.1 1054.5,7325.6 1360.0,7771.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0213/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.10398829484939,38.83177175554022]}},{"type":"Feature","properties":{"resourceCoords":[6616.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09848692494751,38.83609866901332]}},{"type":"Feature","properties":{"resourceCoords":[6616.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09198766322216,38.831013121700686]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09748903312403,38.826686208227585]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0214/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p214","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0214/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0214/info.json","type":"ImageService2","height":7796,"width":6684},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2359.8,0.0 6308.6,0.0 6260.4,1595.8 6684.0,1609.2 6684.0,5940.7 5171.6,7084.8 5414.8,7394.9 5203.5,7491.0 4847.8,7796.0 -0.0,7796.0 -0.0,-0.0 151.8,0.0 73.4,1934.4 1421.1,1965.2 1136.4,1511.0 2359.8,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0214/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09923974496583,38.8278563651535]}},{"type":"Feature","properties":{"resourceCoords":[6684.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09386422845745,38.83244218050207]}},{"type":"Feature","properties":{"resourceCoords":[6684.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08704638095844,38.82752336810226]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.09242189746682,38.82293755275369]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0022/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p22","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0022/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0022/info.json","type":"ImageService2","height":7796,"width":6504},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6216.2,7674.3 320.5,7685.0 340.8,86.0 6243.7,76.4 6216.2,7674.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0022/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0468459783788,38.81208912393864]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04312830589082,38.811607288623534]}},{"type":"Feature","properties":{"resourceCoords":[6504.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04386429580725,38.80811041057739]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04758196829523,38.8085922458925]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0023/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p23","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0023/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0023/info.json","type":"ImageService2","height":7796,"width":6516},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"729.8,2630.9 5872.5,1541.3 5943.2,1686.8 6516.0,6283.6 6516.0,7228.4 5776.3,7228.6 3235.8,7229.1 707.9,5298.1 729.8,2630.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0023/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05676637756609,38.81031095388251]}},{"type":"Feature","properties":{"resourceCoords":[6516.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05560757651904,38.816129406246205]}},{"type":"Feature","properties":{"resourceCoords":[6516.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04673609999618,38.81504147371282]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04789490104324,38.80922302134912]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0024/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p24","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"16"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0024/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0024/info.json","type":"ImageService2","height":7796,"width":6504},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"474.9,3632.4 458.9,2351.3 302.7,2351.2 299.7,1497.1 5621.5,1479.7 5616.6,0.0 6504.0,0.0 6504.0,7796.0 5128.9,7796.0 5128.3,7061.5 1244.5,7029.8 1242.7,3628.6 474.9,3632.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0024/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2212.0,2348.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0419233,38.8125933]}},{"type":"Feature","properties":{"resourceCoords":[3156.0,7416.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0418153,38.8079153]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0025/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p25","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0025/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0025/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7603.1 -0.0,167.3 2315.9,164.0 2312.0,0.0 2828.4,18.7 4310.5,2379.8 4325.7,0.0 6277.7,120.7 6234.4,5125.5 6544.0,5128.9 6544.0,7650.6 -0.0,7603.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0025/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04727523123805,38.81565723653497]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0434737508229,38.81519166703705]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04418058371687,38.81163799287761]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04798206413201,38.812103562375526]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0026/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p26","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0026/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0026/info.json","type":"ImageService2","height":7796,"width":6524},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"789.8,6117.5 824.5,2558.7 367.0,2546.2 289.9,1389.7 -0.0,1386.1 -0.0,-0.0 6524.0,0.0 6524.0,7796.0 1229.8,7796.0 1228.3,6116.1 789.8,6117.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0026/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3128.0,4856.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0412043,38.8160093]}},{"type":"Feature","properties":{"resourceCoords":[3128.0,7392.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0416863,38.8137253]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0027/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p27","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0027/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0027/info.json","type":"ImageService2","height":7796,"width":6588},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6588.0,7248.6 5437.2,7337.2 5430.3,7796.0 1886.0,7796.0 1975.9,7255.3 736.9,7267.8 1910.8,6499.4 1915.2,6239.4 1832.7,6242.9 1830.1,5199.1 1808.9,5077.7 1300.7,5087.4 1283.1,4156.0 904.6,4339.3 562.4,4389.3 562.1,3451.7 0.0,3453.7 0.0,2513.5 2552.3,2498.4 5029.6,1751.7 5361.6,2896.2 6588.0,2540.4 6588.0,7248.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0027/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05349855493007,38.81475326792866]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05216680620346,38.82070117141162]}},{"type":"Feature","properties":{"resourceCoords":[6588.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04319651255844,38.81946460905199]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04452826128505,38.81351670556903]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0029__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p29 [2]","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6584.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0029__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0029/info.json","type":"ImageService2","height":7796,"width":6584},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 0.0,5198.8 619.2,5210.8 3975.2,5180.4 3990.0,7796.0 6584.0,7796.0 6584.0,513.5 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0029__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2276.0,452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.052825,38.798753]}},{"type":"Feature","properties":{"resourceCoords":[5068.0,3096.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0500787,38.7960164]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p3","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0003/info.json","type":"ImageService2","height":7796,"width":6556},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"732.4,1084.3 728.0,0.0 5736.6,0.0 5751.1,1083.3 5022.1,1083.4 5103.5,6733.2 1496.7,6739.8 1443.1,1084.2 732.4,1084.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5780.0,4876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0433791,38.8057826]}},{"type":"Feature","properties":{"resourceCoords":[5780.0,6732.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0423033,38.8056413]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0030__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p30 [1]","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"17"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6544.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0030__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0030/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1082.3,7569.0 -0.0,7586.5 -0.0,7796.0 3604.0,7796.0 3608.8,5985.2 6544.0,5983.6 6544.0,384.7 965.4,380.1 1082.3,7569.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0030__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3380.0,2936.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0455922,38.7954504]}},{"type":"Feature","properties":{"resourceCoords":[5748.0,364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.042352,38.797416]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0031__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p31 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3469.2"},{"label":"split_canvas_h","value":"2517.2"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0031__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0031/info.json","type":"ImageService2","height":7796,"width":6532},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2234.4,747.9 3238.0,263.6 3133.6,0.0 -0.0,-0.0 -0.0,2517.2 2044.8,2195.6 2601.3,1337.7 2234.4,747.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0031__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2232.8,748.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.073179,38.809115]}},{"type":"Feature","properties":{"resourceCoords":[336.1,1684.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.073516,38.80717]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0032/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p32","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0032/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0032/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2434.7 234.3,2658.6 419.2,2583.3 358.9,2021.0 564.2,1696.6 2247.4,2908.5 2744.6,2777.1 2053.8,1190.2 3697.0,489.7 5294.4,4437.2 5582.5,4329.3 5731.3,4439.7 5709.7,6208.8 5383.1,6206.2 5363.2,7796.0 -0.0,7796.0 -0.0,2434.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0032/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06548090260023,38.81080730087614]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05787746434765,38.80984916792794]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0593319731305,38.80274069146346]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06693541138307,38.80369882441166]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0033__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p33 [2]","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"21"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6632.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0033__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0033/info.json","type":"ImageService2","height":7796,"width":6632},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2290.0,0.0 2262.8,3082.0 1817.6,3082.4 1817.2,4752.8 0.0,4719.6 0.0,5251.8 377.6,5243.6 386.3,5645.3 0.0,5647.4 0.0,6284.6 2582.0,6264.3 2585.3,6577.6 3602.2,6615.1 3638.2,4657.6 3907.5,4648.0 3846.3,2665.2 5048.0,2653.5 5048.4,2737.4 5458.0,2745.0 6030.2,2972.9 5964.8,335.2 5029.5,334.7 5028.7,0.0 2290.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0033__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2572.0,5620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.054503,38.80134]}},{"type":"Feature","properties":{"resourceCoords":[5176.0,7516.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0518498,38.8033485]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0034/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p34","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0034/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0034/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"386.8,5537.6 -0.0,5152.9 -0.0,-0.0 6240.4,0.0 6423.9,294.5 6512.5,823.2 6544.0,1925.3 5842.5,3806.4 5624.9,3719.4 5578.3,3704.7 5122.9,4915.4 5227.1,5061.0 6206.0,5448.0 6033.9,5918.3 5795.1,7044.6 5993.6,7796.0 5409.2,7796.0 5289.6,7451.8 4245.7,7796.0 1095.5,7796.0 1626.5,7495.4 -0.0,6658.8 -0.0,6096.1 386.8,5537.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0034/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07623400065988,38.81447937907892]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06946031764843,38.81711558252882]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06545806224983,38.81078336138505]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07223174526128,38.808147157935146]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0035/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p35","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"13"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0035/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0035/info.json","type":"ImageService2","height":7796,"width":6540},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5467.4,860.0 5740.6,2452.8 6359.9,2465.5 6360.5,3212.3 6540.0,3213.7 6540.0,7796.0 6499.1,7659.8 4274.5,7796.0 -0.0,7796.0 -0.0,886.3 5467.4,860.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0035/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3624.0,3480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0640643,38.8117053]}},{"type":"Feature","properties":{"resourceCoords":[280.0,888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0682323,38.8137413]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0036/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p36","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0036/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0036/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4796.0,0.0 6140.9,1364.9 6544.0,1662.1 6544.0,3917.1 6488.5,4051.5 6146.9,3910.2 5667.2,5068.0 6007.2,5207.6 5177.5,7195.3 3657.6,6559.0 3511.5,6908.0 1530.3,6102.0 1238.1,6132.4 5.4,6808.4 514.2,7008.1 683.2,7568.9 -0.0,7643.9 -0.0,3413.9 461.8,3324.5 437.4,3492.7 304.1,3488.4 1045.7,989.2 870.5,965.3 963.6,235.7 256.2,130.0 246.4,0.0 4796.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0036/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[332.0,876.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0615717,38.8121645]}},{"type":"Feature","properties":{"resourceCoords":[3372.0,-1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0586413,38.8147093]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0037/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p37","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0037/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0037/info.json","type":"ImageService2","height":7796,"width":6580},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6555.4,7796.0 973.6,7796.0 1133.6,7683.0 1214.7,2760.6 353.9,2347.8 385.6,-0.0 6176.5,-0.0 6178.2,507.2 6580.0,508.3 6555.4,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0037/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06296448817432,38.82386863942576]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06215325483775,38.81798968663817]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0710307711348,38.81723555674365]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07184200447136,38.82311450953124]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0038/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p38","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"40"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0038/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0038/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2703.5,6242.1 2405.0,6589.2 2834.1,7796.0 -0.0,7796.0 -0.0,7596.0 1979.9,7624.7 2097.9,421.3 6224.1,492.7 6139.4,5697.3 3937.7,5696.3 2703.5,6242.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0038/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2668.0,1336.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0637063,38.8173293]}},{"type":"Feature","properties":{"resourceCoords":[3828.0,3332.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0658367,38.8160715]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0039/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p39","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0039/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0039/info.json","type":"ImageService2","height":7796,"width":6580},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"593.3,3804.7 571.5,0.0 1624.6,0.0 1644.0,1557.3 4442.8,1456.9 4391.9,63.0 5391.7,22.8 5544.3,3177.9 4838.9,3184.1 4885.9,5044.3 5425.5,5393.5 780.5,6032.4 593.3,3804.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0039/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06343545524783,38.81824667711606]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05593031476661,38.81879953398886]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05509553699613,38.81182215140764]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06260067747735,38.81126929453484]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p4","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0004/info.json","type":"ImageService2","height":7796,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"733.9,588.1 5844.0,572.0 5879.7,4569.3 5154.7,4572.5 5140.4,7742.7 1559.2,7796.0 1531.6,4588.6 768.0,4592.0 733.9,588.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[768.0,4592.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0405126,38.8030964]}},{"type":"Feature","properties":{"resourceCoords":[5844.0,572.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0423033,38.8056413]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0040/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p40","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0040/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0040/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"701.0,3454.5 620.5,0.0 6544.0,0.0 6544.0,3269.4 5783.4,5852.3 6544.0,6078.5 6544.0,6619.2 6202.0,7796.0 5735.9,7796.0 5247.0,7653.4 5611.7,6432.1 3772.5,5904.2 3420.5,7111.3 4335.0,7392.3 4210.7,7796.0 3221.7,7796.0 3352.2,7349.3 2857.9,7207.9 2819.6,7796.0 2565.6,7796.0 2493.1,7141.6 -0.0,5292.0 -0.0,3443.0 701.0,3454.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0040/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05804593353952,38.81889602563531]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05055476300035,38.819597943101215]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04948906893225,38.81259532786508]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05698023947141,38.81189341039918]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0041/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p41","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0041/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0041/info.json","type":"ImageService2","height":7796,"width":6580},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2729.2,6884.7 1928.3,7028.5 936.1,6930.3 -0.0,7015.2 -0.0,6155.9 201.4,5725.5 -0.0,5634.0 -0.0,982.2 6257.8,815.2 6237.9,4874.1 6386.2,4921.2 6237.6,4920.4 6192.4,7272.8 5033.7,6793.6 2729.2,6884.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0041/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05813721925325,38.829581728108224]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05728476097882,38.82371912788287]}},{"type":"Feature","properties":{"resourceCoords":[6580.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06613829702324,38.82292673872427]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06699075529768,38.828789338949626]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0042/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p42","metadata":[{"label":"streets","value":"15"},{"label":"intersections","value":"26"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0042/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0042/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1864.5,6224.7 1329.0,6214.8 1459.3,608.1 1508.3,461.8 5505.8,545.4 5579.9,6404.9 4592.0,6409.3 4590.4,7796.0 1825.1,7796.0 1864.5,6224.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0042/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3104.0,5256.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0603053,38.8194183]}},{"type":"Feature","properties":{"resourceCoords":[4028.0,520.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0599565,38.8237724]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0043/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p43","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0043/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0043/info.json","type":"ImageService2","height":7796,"width":6604},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6046.1,7648.0 6049.7,7796.0 -0.0,7796.0 0.0,0.0 5331.4,55.1 5221.9,7661.8 6046.1,7648.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0043/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05212009564416,38.839184388896406]}},{"type":"Feature","properties":{"resourceCoords":[6604.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05120665447657,38.83334755143378]}},{"type":"Feature","properties":{"resourceCoords":[6604.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05999043614553,38.83250167645245]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06090387731311,38.838338513915076]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0044/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p44","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0044/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0044/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4766.3,7417.6 4768.5,7796.0 955.8,7796.0 935.4,7552.6 -0.0,7582.8 -0.0,67.8 1258.0,-0.0 5718.0,-0.0 5720.9,216.7 6544.0,225.0 6544.0,7364.3 4766.3,7417.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0044/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05136733222123,38.83447293732934]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0505585587701,38.828607842627314]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05946520378892,38.82785197655587]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06027397724004,38.833717071257894]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0045/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p45","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0045/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0045/info.json","type":"ImageService2","height":7796,"width":6592},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1418.6,243.3 587.3,237.9 583.6,19.1 5483.4,-0.0 5515.0,7302.9 1444.7,7454.1 1418.6,243.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0045/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05070802806326,38.82986795548773]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04992852432436,38.824015793330254]}},{"type":"Feature","properties":{"resourceCoords":[6592.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05875024949866,38.82329254024712]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05952975323756,38.82914470240459]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0046/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p46","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0046/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0046/info.json","type":"ImageService2","height":7796,"width":6544},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,0.0 6544.0,-0.0 6544.0,1208.6 5895.9,1215.4 5896.9,1315.8 6544.0,1776.1 6544.0,2596.1 5905.5,2139.5 5957.7,7143.9 -0.0,7354.6 -0.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0046/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04989802399538,38.82501377166532]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04908227738949,38.81913451951454]}},{"type":"Feature","properties":{"resourceCoords":[6544.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05800923135632,38.81837203479186]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05882497796222,38.82425128694263]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0047/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p47","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0047/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0047/info.json","type":"ImageService2","height":7796,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3824.6,7496.1 2497.8,6636.0 2031.2,6195.9 947.8,4825.6 85.1,4091.5 1875.4,2587.0 -0.0,892.2 0.0,-0.0 599.2,-0.0 571.1,1138.4 3744.4,1216.7 3707.6,1281.0 4010.3,1223.3 6572.0,1286.4 6572.0,7430.6 4022.9,7557.8 3824.6,7496.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0047/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05971104928308,38.83899500995958]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05861117620147,38.83316045727876]}},{"type":"Feature","properties":{"resourceCoords":[6572.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06743424787213,38.83213697840393]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06853412095374,38.837971531084754]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0048/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p48","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0048/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0048/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4381.5,7074.0 1035.1,7384.8 871.5,1097.5 993.7,1094.2 1015.3,1378.5 4839.3,1388.7 4773.1,1874.5 4835.6,1908.4 4808.6,5655.1 5009.2,5748.0 4381.5,7074.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0048/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05877430389297,38.83390623908705]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.05786867409154,38.8280528740681]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06672495140023,38.8272095733327]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06763058120167,38.83306293835165]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0049/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p49","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0049/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0049/info.json","type":"ImageService2","height":7796,"width":6596},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2072.6 -0.0,0.0 6527.4,0.0 6596.0,122.7 6549.5,4803.8 5939.9,6183.5 4866.4,6641.7 5158.0,7229.5 5820.3,7796.0 4460.3,7796.0 4195.7,7400.6 3502.3,7397.0 1277.1,7628.7 1046.3,7796.0 365.8,7796.0 293.0,4164.1 54.0,4155.0 179.4,3112.9 -0.0,2072.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0049/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07773147154235,38.8390414289846]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07018646485179,38.83882529232529]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07051211872354,38.83182986603613]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0780571254141,38.83204600269544]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p5","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0005/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5697.6,6715.6 685.4,6688.1 695.5,2933.8 3212.0,2964.0 3211.2,1105.0 5741.5,1122.6 5697.6,6715.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0005/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3212.0,2964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0508843,38.8079003]}},{"type":"Feature","properties":{"resourceCoords":[684.0,4812.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0500433,38.8066203]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0050/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p50","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0050/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0050/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2100.8,3577.4 2036.6,3373.5 460.3,2107.6 404.5,1886.9 -0.0,1942.8 -0.0,1138.3 416.4,1012.9 316.9,548.2 -0.0,-0.0 828.0,-0.0 830.4,833.9 2190.7,579.5 3731.2,785.6 5664.5,674.2 6365.8,744.0 6402.6,1872.2 6096.5,4084.0 6361.3,5783.2 5765.6,6275.9 5509.7,6942.8 5300.4,7081.7 4770.8,6999.3 4122.5,6396.1 3980.2,6462.2 3959.9,6580.1 2100.8,3577.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0050/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06992117840853,38.84213254901011]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06365864344819,38.838837297402804]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06864492545208,38.83300634790858]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07490746041242,38.836301599515885]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0051/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p51","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0051/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0051/info.json","type":"ImageService2","height":7796,"width":6596},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3009.2,7323.6 443.1,2524.0 497.0,2376.9 1645.4,364.3 4988.0,418.5 5050.3,983.9 4703.6,7272.0 3009.2,7323.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0051/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06751007260182,38.836135539600015]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06604089745632,38.83029707302708]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07483738002348,38.8289348579232]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07630655516898,38.83477332449613]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0052/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p52","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0052/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0052/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1050.8,394.0 3789.7,414.0 4038.8,-0.0 4252.1,-0.0 4207.4,416.3 5143.2,431.6 5972.7,624.6 5748.2,1976.7 6089.1,2923.4 5265.1,3970.6 4526.4,5830.6 4302.8,7796.0 533.7,7796.0 590.8,7250.4 1836.2,7167.6 1889.2,6923.1 1763.1,6336.2 651.4,6397.2 681.5,5450.3 579.4,5139.1 -0.0,5411.0 -0.0,4174.1 834.1,3844.7 712.1,3353.1 731.7,2534.5 1098.8,961.8 1050.8,394.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0052/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06669366975258,38.832648402048996]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06504517979248,38.82687606596366]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07377866218098,38.82534099718205]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07542715214109,38.83111333326739]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0053/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p53","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0053/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0053/info.json","type":"ImageService2","height":7796,"width":6596},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2333.7,7578.5 1666.4,7459.6 -0.0,3738.6 -0.0,3738.6 0.0,-0.0 6377.7,152.6 6596.0,1257.7 6446.3,4012.2 6068.9,7740.9 5932.1,7796.0 5932.1,7796.0 2333.7,7578.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0053/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08097750385764,38.830644111612436]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07345716784064,38.83096340549174]}},{"type":"Feature","properties":{"resourceCoords":[6596.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07297614146377,38.823990057879314]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08049647748076,38.82367076400001]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0054/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p54","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0054/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0054/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4142.8,7755.4 4055.7,7645.5 346.8,7094.4 269.8,6045.6 844.2,3904.5 1499.8,2860.1 1045.7,1955.5 1107.4,578.1 2438.5,380.6 4357.8,295.3 4780.4,415.5 6391.2,1168.4 6345.1,6109.3 6185.4,6223.9 6568.0,6221.1 6568.0,7330.0 4505.7,7482.3 4142.8,7755.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0054/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.065364986174,38.82831480309192]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0646114193018,38.822464015993596]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07346310794324,38.82176225805127]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07421667481545,38.8276130451496]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p55 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2098.8"},{"label":"split_canvas_w","value":"2564.4"},{"label":"split_canvas_h","value":"5697.2"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055/info.json","type":"ImageService2","height":7796,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1762.4,7427.3 2564.4,2691.6 1228.0,2468.4 1216.4,2106.0 0.0,2098.8 -0.0,7070.2 1762.4,7427.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[788.1,4753.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0825303,38.8131093]}},{"type":"Feature","properties":{"resourceCoords":[1880.3,5117.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0813279,38.8128278]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p55 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6572.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055/info.json","type":"ImageService2","height":7796,"width":6572},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5823.0,6267.2 5885.1,6334.2 5830.4,5473.9 6572.0,4403.7 6572.0,0.0 -0.0,0.0 0.0,2098.8 1216.4,2106.0 1228.0,2468.4 2564.4,2691.6 1700.0,7796.0 3179.0,7796.0 5815.6,7096.2 5823.0,6267.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0055__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6068.0,6612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0814683,38.8238433]}},{"type":"Feature","properties":{"resourceCoords":[9644.0,236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0879564,38.8272817]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0056/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p56","metadata":[{"label":"streets","value":"16"},{"label":"intersections","value":"23"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0056/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0056/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6568.0,0.0 6568.0,6785.6 6293.1,7130.6 6529.5,7360.7 6568.0,7796.0 4883.5,7796.0 5711.1,6697.8 4095.0,6940.4 3919.7,7796.0 3342.3,7796.0 3178.1,7204.7 3044.3,7205.6 3054.1,6877.6 1164.2,7107.5 490.0,7282.7 0.0,7582.7 0.0,6369.7 58.0,6431.1 0.0,5633.3 677.2,4639.9 640.4,567.0 0.0,572.7 0.0,-0.0 1810.8,0.0 2286.4,357.6 3032.3,403.3 3025.8,0.0 6568.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0056/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3852.0,3428.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0848323,38.8273833]}},{"type":"Feature","properties":{"resourceCoords":[232.0,6684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0814683,38.8238433]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0057/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p57","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0057/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0057/info.json","type":"ImageService2","height":7796,"width":6536},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"490.5,3124.6 694.9,1127.2 455.6,0.0 6536.0,0.0 6536.0,7796.0 201.0,7796.0 600.5,4805.0 490.5,3124.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0057/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0699547266022,38.8407486741852]}},{"type":"Feature","properties":{"resourceCoords":[6536.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06576652540105,38.845676512604555]}},{"type":"Feature","properties":{"resourceCoords":[6536.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0582729606087,38.841758055442554]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06246116180986,38.8368302170232]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0058/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p58","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0058/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0058/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2667.6 274.6,2629.0 251.0,2284.6 568.1,32.2 886.0,130.0 921.1,0.0 2757.1,0.0 2772.0,162.8 2906.3,0.0 3768.1,0.0 3794.4,234.4 4365.9,1077.8 4863.0,768.6 4739.1,0.0 5571.6,0.0 5636.4,546.6 5479.2,1151.9 6001.4,1958.3 5807.5,2786.6 5654.7,2884.0 6568.0,4182.6 6568.0,7796.0 -0.0,7796.0 -0.0,2667.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0058/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0815811936871,38.826308214047735]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07417548771676,38.82733202261329]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07262659905955,38.820435305745065]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08003230502989,38.81941149717951]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0059__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p59 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6536.0"},{"label":"split_canvas_h","value":"7796.0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0059__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0059/info.json","type":"ImageService2","height":7796,"width":6536},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4196.8,7796.0 4434.0,6552.4 6536.0,6265.2 6536.0,774.2 6463.5,783.2 6536.0,755.7 4445.4,580.4 4452.8,497.4 1527.0,216.4 1375.4,97.9 1416.4,-0.0 -0.0,0.0 -0.0,7796.0 2249.5,7796.0 2435.1,7740.4 2553.1,7796.0 4196.8,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0059__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4652.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0791653,38.8387963]}},{"type":"Feature","properties":{"resourceCoords":[2848.0,5400.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0833627,38.8402463]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0006/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p6","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0006/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0006/info.json","type":"ImageService2","height":7796,"width":6556},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5880.2,6908.6 857.6,6912.5 837.9,4945.3 1157.0,4946.2 1158.7,2965.9 839.6,2965.0 843.6,1097.0 5873.6,1097.0 5880.2,6908.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0006/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3356.0,4944.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.046482,38.807333]}},{"type":"Feature","properties":{"resourceCoords":[5876.0,2964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0473883,38.8086183]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0060/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p60","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0060/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0060/info.json","type":"ImageService2","height":7796,"width":6568},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6568.0,7796.0 -0.0,7796.0 -0.0,6577.7 1087.4,6619.2 881.9,670.0 1654.7,546.1 2237.2,574.9 2906.5,716.8 2928.0,482.9 6568.0,601.3 6568.0,2821.8 6325.5,3573.7 6364.5,3786.3 6568.0,4052.0 6568.0,4816.9 6496.4,4889.6 6568.0,4996.4 6568.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0060/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0770659427591,38.83797937844319]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0769351112234,38.8319754808063]}},{"type":"Feature","properties":{"resourceCoords":[6568.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08601970171168,38.83185366104734]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.08615053324738,38.83785755868423]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0061/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p61","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0061/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0061/info.json","type":"ImageService2","height":7796,"width":6552},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"103.7,3467.4 205.3,3498.7 69.6,2095.7 -0.0,2102.4 -0.0,-0.0 6552.0,0.0 6552.0,3456.7 6395.3,3905.8 5974.1,3796.2 5555.4,4484.1 5930.3,4646.7 5863.2,4864.4 6552.0,6766.9 6500.8,6974.6 6498.2,6627.4 6428.8,6505.4 -0.0,6554.0 -0.0,3628.9 103.7,3467.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0061/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0773045661028,38.84493092910519]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.06979494395617,38.84467119004162]}},{"type":"Feature","properties":{"resourceCoords":[6552.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.07018895395817,38.83766238478769]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0776985761048,38.83792212385126]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0062__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p62 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"5072.8"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0062__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0062/info.json","type":"ImageService2","height":7796,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"217.0,2410.5 6464.6,5016.3 6479.9,5017.4 6531.4,3740.9 5947.9,3306.8 1662.0,475.9 697.5,0.0 -0.0,-0.0 -0.0,2225.4 217.0,2410.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0062__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2848.0,780.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0796383,38.8325933]}},{"type":"Feature","properties":{"resourceCoords":[3848.0,2156.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0774552,38.8320093]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p7","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0007/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6612.0,6799.1 0.0,6713.4 0.0,985.4 5825.3,1047.8 5803.4,2944.4 6612.0,2958.2 6612.0,6799.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0007/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1976.0,6740.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0421793,38.8062163]}},{"type":"Feature","properties":{"resourceCoords":[3252.0,4864.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.043142,38.806915]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p8","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0008/info.json","type":"ImageService2","height":7796,"width":6548},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"670.4,583.6 6548.0,555.0 6548.0,4574.2 5061.9,4581.6 5080.2,7383.2 6548.0,7377.1 6548.0,7796.0 0.0,7796.0 0.0,4608.0 724.2,4603.2 670.4,583.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0008/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.04269763838627,38.80538954577654]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.0420581603325,38.808285169578575]}},{"type":"Feature","properties":{"resourceCoords":[6548.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03766511473518,38.80768768267438]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7796.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-77.03830459278895,38.804792058872344]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alexandria, Virginia | 1959 | sanborn08968_009 p9","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-24T02:32:30Z","modified":"2026-09-24T02:32:30Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0009/info.json","type":"ImageService2","height":7796,"width":6612},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"568.9,1245.8 5045.0,1344.6 5045.0,1123.2 6612.0,1128.3 6612.0,5858.8 5850.7,5863.0 5848.0,6748.0 827.9,6737.3 821.9,4969.1 932.8,4964.2 535.2,4454.5 910.1,3803.2 818.2,3880.1 782.6,2958.3 566.9,2977.5 568.9,1245.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884am:g3884am_g089681959:08968_1959-0009/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3284.0,3008.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0518498,38.8033485]}},{"type":"Feature","properties":{"resourceCoords":[5848.0,6748.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-77.0494365,38.8042224]}}]}}]}