{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn00046_009.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Gadsden, Alabama | 1943 | key map | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000a/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Gadsden, Alabama | 1943 | sanborn00046_009 p0a","metadata":[{"label":"streets","value":"62"},{"label":"intersections","value":"46"}],"created":"2026-09-22T02:36:01Z","modified":"2026-09-22T02:36:01Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000a/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000a/info.json","type":"ImageService2","height":7796,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4279.4,0.0 4323.7,7197.9 4345.8,7196.5 4354.1,7437.8 4325.2,7439.4 4326.0,7573.1 4362.0,7571.2 4353.4,7616.6 4475.1,7743.0 4410.9,7796.0 -0.0,7796.0 -0.0,0.0 4279.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000a/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4144.3,1445.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.0379896,34.0269627]}},{"type":"Feature","properties":{"resourceCoords":[3317.0,3998.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.050071,33.9994828]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000b/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Gadsden, Alabama | 1943 | sanborn00046_009 p0b","metadata":[{"label":"streets","value":"109"},{"label":"intersections","value":"127"}],"created":"2026-09-22T02:36:01Z","modified":"2026-09-22T02:36:01Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000b/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000b/info.json","type":"ImageService2","height":7796,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7796.0 -0.0,7796.0 -0.0,7737.1 83.2,7739.1 147.6,7688.5 27.0,7561.3 35.9,7516.9 -0.0,7517.8 -0.0,7386.3 28.8,7385.5 22.0,7147.9 -0.0,7148.8 0.0,-0.0 6452.0,0.0 6452.0,7796.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd397m:g3974m:g3974gm:g3974gm_g000461943:00046_1943-0000b/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4272.3,4103.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-85.9804066,33.9979033]}},{"type":"Feature","properties":{"resourceCoords":[1184.4,1322.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-86.0206455,34.0285359]}}]}}]}