{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn08574_005.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Henrietta, Texas | 1907 | 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:gmd403m:g4034m:g4034hm:g4034hm_g085741907:08574_1907-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Henrietta, Texas | 1907 | sanborn08574_005 p1 [2]","metadata":[{"label":"streets","value":"27"},{"label":"intersections","value":"135"},{"label":"split_canvas_x","value":"4050.9"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2827.6"},{"label":"split_canvas_h","value":"8074.1"}],"created":"2026-09-23T04:45:05Z","modified":"2026-09-23T04:45:05Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034hm:g4034hm_g085741907:08574_1907-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034hm:g4034hm_g085741907:08574_1907-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6878.4,8074.1 6878.4,3163.1 6878.4,2688.8 6878.4,0.0 5215.3,0.0 4537.3,0.0 4050.9,0.0 4050.9,9.6 4064.7,2983.8 4246.6,2977.7 4262.1,3451.7 4586.2,3461.2 4595.6,4292.7 4661.8,4295.3 4635.6,7840.0 4635.9,8074.1 6878.4,8074.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd403m:g4034m:g4034hm:g4034hm_g085741907:08574_1907-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5418.1,2662.9],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.1943135,33.8164746]}},{"type":"Feature","properties":{"resourceCoords":[5726.7,2940.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-98.1923072,33.8147313]}}]}}]}