{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02843_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Tama, 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":"4"},{"label":"placed","value":"1"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p1__2 (tier 4, 41.96218,-92.57825 +/-100m); p1__3 (tier 4, 41.96218,-92.57825 +/-100m); p1__4 (tier 4, 41.96218,-92.57825 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431883:02843_1883-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Tama, Iowa | 1883 | sanborn02843_001 p1 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.54"},{"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":"2026-10-18T05:53:27Z","modified":"2026-10-18T05:53:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431883:02843_1883-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431883:02843_1883-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1587.5,522.4 1602.5,272.2 1519.7,78.1 1110.2,29.9 66.2,44.1 38.8,1241.8 84.1,1574.4 222.2,1583.0 305.0,1583.0 305.0,1588.2 426.9,1868.7 1217.9,1861.8 1362.8,635.3 1368.1,567.5 1587.5,522.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154tm:g028431883:02843_1883-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[930.0,909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.5781971,41.9619366]}},{"type":"Feature","properties":{"resourceCoords":[569.0,909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.5780154,41.9626065]}}]}}]}