{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08721_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Rockdale, Texas | 1891 | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"4"},{"label":"placed","value":"4"},{"label":"unplaced","value":"0"},{"label":"fit sources","value":"georef 3, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Rockdale, Texas | 1891 | sanborn08721_002 p1 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.06"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1990.8"},{"label":"split_canvas_h","value":"2322.4"}],"created":"2026-10-18T02:02:34Z","modified":"2026-10-18T02:02:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"292.9,467.4 494.0,448.1 486.7,441.5 456.7,56.9 287.1,18.4 156.4,76.0 100.8,48.0 74.2,50.6 73.2,489.1 292.9,467.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[67.0,489.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.0024388,30.6573529]}},{"type":"Feature","properties":{"resourceCoords":[485.7,16.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.0019231,30.6586746]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Rockdale, Texas | 1891 | sanborn08721_002 p1 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T02:02:34Z","modified":"2026-10-18T02:02:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1548.3,1675.0 1456.3,1378.1 1484.0,1377.8 1493.7,1131.8 1498.9,865.4 1503.3,329.0 1502.7,1.0 1434.3,1.0 1417.7,41.2 890.0,33.8 600.4,102.4 497.4,236.3 496.9,579.5 493.3,579.8 493.3,580.6 484.6,580.5 78.5,613.2 49.4,933.1 72.8,1059.9 140.5,1071.0 57.8,1321.9 91.5,1413.2 232.5,1487.3 410.5,1490.9 410.8,1495.4 413.3,1495.4 413.0,1529.3 420.4,1643.3 516.5,1693.8 523.7,1820.2 636.0,1871.0 1410.8,1828.4 1551.0,1779.5 1578.9,1676.4 1548.3,1675.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1491.0,845.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.00142341155984,30.65564493916317]}},{"type":"Feature","properties":{"resourceCoords":[959.0,1373.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.00191153652075,30.65431276901174]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Rockdale, Texas | 1891 | sanborn08721_002 p1 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.92"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5956.8"},{"label":"split_canvas_w","value":"1653.2"},{"label":"split_canvas_h","value":"1695.2"}],"created":"2026-10-18T02:02:34Z","modified":"2026-10-18T02:02:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"235.4,1869.5 232.3,1826.5 382.1,1735.7 380.8,1563.1 90.7,1569.9 65.3,1708.5 32.0,1726.5 17.2,1706.0 5.6,1894.7 406.2,1911.8 322.4,1836.1 285.9,1891.1 235.4,1869.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1489.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-97.00394448396814,30.659580690148648]}},{"type":"Feature","properties":{"resourceCoords":[413.3,1489.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-97.00315296276311,30.659929890959837]}},{"type":"Feature","properties":{"resourceCoords":[413.3,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-97.00273572425749,30.65923168262849]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-97.00352724546252,30.6588824818173]}},{"type":"Feature","properties":{"resourceCoords":[81.0,1831.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.0034527,30.659086]}},{"type":"Feature","properties":{"resourceCoords":[81.0,1831.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.0034527,30.659086]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Rockdale, Texas | 1891 | sanborn08721_002 p2","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T02:02:34Z","modified":"2026-10-18T02:02:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"138.0,48.9 399.7,41.5 668.1,34.8 667.9,27.2 1474.8,32.7 1575.0,91.8 1596.8,1201.7 1530.7,1860.0 239.0,1887.0 232.6,1912.0 201.6,1912.0 105.4,1615.6 133.2,1615.0 139.6,1368.2 141.2,1101.2 138.3,563.5 133.3,233.8 65.1,234.8 138.0,48.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034rm:g4034rm_g087211891:08721_1891-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1181.0,35.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-97.0004287,30.6582613]}},{"type":"Feature","properties":{"resourceCoords":[674.0,1609.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-96.9998638,30.6552256]}}]}}]}