{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01881_003.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Galva, Illinois | 1899 | mapsnap generated fit (2026-10-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-22"},{"label":"run","value":"corpus-v2.1"},{"label":"pages","value":"9"},{"label":"placed","value":"1"},{"label":"unplaced","value":"8"},{"label":"fit sources","value":"georef 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 41.16596,-90.04574 +/-100m); p1__2 (tier 4, 41.16596,-90.04574 +/-100m); p1__3 (tier 4, 41.16596,-90.04574 +/-100m); p1__4 (tier 4, 41.16596,-90.04574 +/-100m); p1__5 (tier 4, 41.16596,-90.04574 +/-100m); p1__6 (tier 4, 41.16596,-90.04574 +/-100m); p2__2 (tier 1, 41.16767,-90.04444 +/-100m); p3 (tier 2, 41.16644,-90.04457 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104gm:g018811899:01881_1899-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Galva, Illinois | 1899 | sanborn01881_003 p2 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.14"},{"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":"2026-10-22T12:56:34Z","modified":"2026-10-22T12:56:34Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104gm:g018811899:01881_1899-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104gm:g018811899:01881_1899-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.5,896.3 73.1,1835.7 1547.2,1884.8 1518.9,1467.7 1611.9,990.0 1546.3,453.5 1248.7,383.8 1182.9,89.7 912.0,157.2 660.7,30.5 67.2,49.7 67.0,352.7 188.1,413.4 198.8,516.8 43.5,896.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104gm:g018811899:01881_1899-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[698.0,1791.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.0451615,41.1649557]}},{"type":"Feature","properties":{"resourceCoords":[698.0,436.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.0463648,41.1664632]}}]}}]}