{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn05379_001.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Portsmouth, New-Hampshire | 1887 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd374m:g3744m:g3744pm:g3744pm_g053791887:05379_1887-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Portsmouth, New-Hampshire | 1887 | sanborn05379_001 p0","metadata":[{"label":"streets","value":"49"},{"label":"intersections","value":"72"}],"created":"2026-09-23T10:19:36Z","modified":"2026-09-23T10:19:36Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd374m:g3744m:g3744pm:g3744pm_g053791887:05379_1887-0000/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd374m:g3744m:g3744pm:g3744pm_g053791887:05379_1887-0000/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7652.0 -0.0,7652.0 0.0,0.0 6452.0,0.0 6452.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd374m:g3744m:g3744pm:g3744pm_g053791887:05379_1887-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2682.8,2484.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.7560913,43.0787805]}},{"type":"Feature","properties":{"resourceCoords":[1778.6,5652.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-70.766609,43.071846]}}]}}]}