{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn09050_006.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Norfolk, Virginia | 1921 | key map | 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"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000L/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Norfolk, Virginia | 1921 | sanborn09050_006 p0L","metadata":[{"label":"streets","value":"154"},{"label":"intersections","value":"223"}],"created":"2026-09-24T01:14:33Z","modified":"2026-09-24T01:14:33Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000L/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000L/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 6397.8,-0.0 6410.4,927.7 6403.4,931.8 6410.6,943.9 6412.5,1087.5 6342.5,967.2 6281.6,1002.7 6373.5,1160.6 6413.2,1137.7 6434.5,2714.4 6413.6,2668.9 6405.1,2672.9 6434.8,2735.3 6435.0,2754.2 6398.1,2676.3 6390.1,2680.1 6423.0,2748.1 6361.8,2772.6 6329.4,2708.5 6267.9,2737.2 6171.7,2752.3 6182.4,2818.6 6089.0,2834.4 6100.4,2900.2 6436.2,2844.7 6438.7,3026.5 6392.9,2995.3 6354.2,3051.6 6439.8,3108.8 6443.4,3373.3 6417.7,3355.9 6369.5,3336.5 6276.5,3474.9 6362.7,3529.5 6444.0,3417.0 6444.8,3480.2 6422.2,3513.7 6445.8,3552.0 6446.8,3624.3 6416.3,3638.4 6452.0,3709.8 6443.3,3734.2 6452.0,3731.1 6452.0,7652.0 -0.0,7652.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000L/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6081.9,2839.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.273801,36.866257]}},{"type":"Feature","properties":{"resourceCoords":[3587.1,3937.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.305745,36.8772162]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000R/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Norfolk, Virginia | 1921 | sanborn09050_006 p0R","metadata":[{"label":"streets","value":"102"},{"label":"intersections","value":"126"}],"created":"2026-09-24T01:14:33Z","modified":"2026-09-24T01:14:33Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000R/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000R/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 -0.0,6412.8 145.6,6254.0 3.9,6130.9 -0.0,6134.4 0.0,5150.8 138.5,5074.1 183.4,5035.1 135.5,4975.6 52.0,5042.9 46.6,5035.2 54.5,5029.6 0.0,4916.1 0.0,4552.8 58.1,4525.1 74.7,4501.5 74.5,4496.9 46.0,4524.2 0.0,4544.7 0.0,4447.1 6.6,4439.6 0.0,4434.8 0.0,4262.8 41.9,4229.5 36.3,4221.2 0.0,4250.2 1.8,3838.9 49.6,3822.8 13.0,3749.4 0.0,3753.9 0.0,3737.3 6.0,3735.3 0.0,3723.2 0.0,3695.0 0.0,3647.2 0.0,3576.0 0.0,3505.1 0.0,3096.9 0.0,2987.1 0.0,-0.0 6452.0,-0.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050192103:09050_03_1921-0000R/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3435.1,5237.4],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.263195,36.821205]}},{"type":"Feature","properties":{"resourceCoords":[1359.4,4212.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.271786,36.844013]}}]}}]}