{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02821_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Shelby, Iowa | 1883 | 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":"2"},{"label":"placed","value":"1"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 2 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 41.51618,-95.45064 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028211883:02821_1883-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Shelby, Iowa | 1883 | sanborn02821_001 p1 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.66"},{"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":"2026-10-18T05:42:31Z","modified":"2026-10-18T05:42:31Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028211883:02821_1883-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028211883:02821_1883-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1554.8,1842.7 1611.8,777.0 1582.7,30.8 628.8,27.8 417.5,128.7 64.5,52.8 51.9,951.0 138.8,1019.9 95.9,1047.6 408.4,1054.2 497.0,1054.9 497.0,1056.0 501.7,1056.1 488.5,1807.9 535.8,1866.8 836.8,1892.5 1469.0,1898.2 1554.8,1842.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028211883:02821_1883-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1013.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.4501394,41.5160464]}},{"type":"Feature","properties":{"resourceCoords":[1580.0,964.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-95.448746,41.515729]}}]}}]}