{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn09050_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Norfolk, Virginia | 1910 | key map | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050191002:09050_02_1910-0000__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Norfolk, Virginia | 1910 | sanborn09050_005 p0 [2]","metadata":[{"label":"streets","value":"70"},{"label":"intersections","value":"64"},{"label":"split_canvas_x","value":"1498.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"5566.8"},{"label":"split_canvas_h","value":"8217.6"}],"created":"2026-09-21T10:28:51Z","modified":"2026-09-21T10:28:51Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050191002:09050_02_1910-0000__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050191002:09050_02_1910-0000","type":"ImageService3","width":1660,"height":1949},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"374.7,1949 1357.4,1949 1660,1949 1660,725.2 1437.1,723.1 1436.5,118.0 1436.5,0.0 1318.4,0.0 1258.8,0.0 991.8,0.0 814.0,0.0 682.5,0.0 375.7,0.0 375.4,740.4 374.7,1949 374.7,1949 374.7,1949\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd388m:g3884m:g3884nm:g3884nm_g09050191002:09050_02_1910-0000__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[845.4,1412.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.277116,36.830125]}},{"type":"Feature","properties":{"resourceCoords":[1040.3,864.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.268882,36.851959]}}]}}]}