{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn08451_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Calvert, Texas | 1891 | 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"},{"label":"pages","value":"3"},{"label":"placed","value":"3"},{"label":"unplaced","value":"0"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Calvert, Texas | 1891 | sanborn08451_002 p1","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"12"}],"created":"2026-09-21T12:10:05Z","modified":"2026-09-21T12:10:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1503.5,1913.0 -0.0,1913.0 -0.0,0.0 1613.0,-0.0 1613.0,39.4 1499.9,36.8 1503.5,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[523.0,1029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6769551,30.9817426]}},{"type":"Feature","properties":{"resourceCoords":[1497.0,1029.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.675727,30.980272]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Calvert, Texas | 1891 | sanborn08451_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T12:10:05Z","modified":"2026-09-21T12:10:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"75.0,39.6 188.5,42.1 188.7,2.4 1478.7,-0.0 1483.4,1913.0 69.4,1913.0 75.0,39.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67400049036702,30.98149598401319]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67197829654121,30.979064563883338]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67531814532934,30.976993863858468]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-96.67734033915515,30.97942528398832]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Calvert, Texas | 1891 | sanborn08451_002 p3","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"14"}],"created":"2026-09-21T12:10:05Z","modified":"2026-09-21T12:10:05Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"53.5,1886.4 -0.0,1885.9 -0.0,0.0 1613.0,-0.0 1613.0,1913.0 -0.0,1913.0 53.5,1886.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034cm:g4034cm_g084511891:08451_1891-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1063.0,1541.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6735036,30.9759578]}},{"type":"Feature","properties":{"resourceCoords":[1063.0,53.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.6708718,30.977598]}}]}}]}