{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02470_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Porter, Indiana | 1899 | 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":"6"},{"label":"placed","value":"1"},{"label":"unplaced","value":"5"},{"label":"fit sources","value":"georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 41.61557,-87.07475 +/-100m); p1__2 (tier 4, 41.61557,-87.07475 +/-100m); p3__1 (tier 4, 41.61557,-87.07475 +/-100m); p3__2 (tier 4, 41.61557,-87.07475 +/-100m); p3__3 (tier 4, 41.61557,-87.07475 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094pm:g4094pm_g024701899:02470_1899-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Porter, Indiana | 1899 | sanborn02470_002 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T13:49:27Z","modified":"2026-10-18T13:49:27Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094pm:g4094pm_g024701899:02470_1899-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094pm:g4094pm_g024701899:02470_1899-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"502.8,1883.5 247.1,1647.9 270.1,1618.9 182.4,1204.3 36.5,1050.5 42.3,66.4 1382.2,41.0 1533.9,199.0 1494.2,421.1 1586.1,804.0 1498.4,1367.7 1583.3,1844.3 1440.8,1890.8 502.8,1883.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd409m:g4094m:g4094pm:g4094pm_g024701899:02470_1899-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[456.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.07478351262755,41.616373336095286]}},{"type":"Feature","properties":{"resourceCoords":[1405.0,710.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-87.0733628261709,41.61494869255141]}}]}}]}