{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn01810_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Crystal Lake, Illinois | 1893 | 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":"9"},{"label":"placed","value":"2"},{"label":"unplaced","value":"7"},{"label":"fit sources","value":"georef:misscale 1, 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, 42.23910,-88.32701 +/-950m); p1__2 (tier 4, 42.23910,-88.32701 +/-950m); p1__3 (tier 4, 42.23910,-88.32701 +/-950m); p3__2 (tier 4, 42.23910,-88.32701 +/-950m); p3__3 (tier 4, 42.23910,-88.32701 +/-950m); p3__4 (tier 4, 42.23910,-88.32701 +/-950m); p3__5 (tier 4, 42.23910,-88.32701 +/-950m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Crystal Lake, Illinois | 1893 | sanborn01810_001 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.64"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T23:46:51Z","modified":"2026-10-18T23:46:51Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"288.6,1863.0 97.8,1810.7 67.4,1002.8 143.8,920.9 155.3,786.3 104.2,200.6 397.5,44.1 569.4,19.9 1230.0,23.5 1567.4,141.9 1612.0,1180.4 1612.0,1183.5 1546.5,1455.7 1562.7,1741.7 1502.4,1821.0 288.6,1863.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.31794015813904,42.24642856152227]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.31467940750127,42.2446958512079]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.31745691410683,42.241834641740866]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.32071766474459,42.24356735205524]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0003__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Crystal Lake, Illinois | 1893 | sanborn01810_001 p3 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.07"},{"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":"2026-10-18T23:46:51Z","modified":"2026-10-18T23:46:51Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0003__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"397.6,1547.8 399.0,1551.0 401.2,1551.0 401.1,1555.9 487.9,1756.5 662.4,1731.5 721.1,1781.8 1107.8,1866.2 1254.7,1839.3 1469.2,1877.9 1572.4,1842.6 1589.7,1296.5 1528.6,1214.9 1244.5,1189.4 1208.9,721.8 911.0,720.9 878.6,88.3 839.6,40.4 207.2,21.8 50.0,69.0 42.2,1410.1 79.8,1544.5 397.6,1547.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd410m:g4104m:g4104cm:g018101893:01810_1893-0003__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[821.0,501.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.3372693,42.234938]}},{"type":"Feature","properties":{"resourceCoords":[821.0,1840.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.3343938,42.2324588]}}]}}]}