{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03689_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Belchertown, Massachusetts | 1922 | 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":"5"},{"label":"placed","value":"2"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 5 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 42.27599,-72.39984 +/-269m); p1__2 (tier 4, 42.27599,-72.39984 +/-269m); p2__2 (tier 4, 42.27599,-72.39984 +/-269m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belchertown, Massachusetts | 1922 | sanborn03689_005 p1 [3]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.04"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3244.0"},{"label":"split_canvas_y","value":"3140.0"},{"label":"split_canvas_w","value":"3208.0"},{"label":"split_canvas_h","value":"4512.0"}],"created":"2026-10-18T11:08:08Z","modified":"2026-10-18T11:08:08Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"811.0,913.0 849.8,931.0 887.0,1020.7 861.0,1117.4 888.5,1253.8 859.0,1327.2 884.3,1432.9 850.0,1473.8 885.0,1532.8 844.6,1676.9 859.6,1841.3 883.8,1875.8 978.9,1842.5 1247.2,1838.2 1404.7,1888.4 1527.6,1851.0 1556.9,1537.2 1527.0,1448.8 1524.1,1094.5 1584.7,990.3 1584.6,925.2 811.0,835.0 811.0,913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[885.0,1871.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.3981605,42.2713183]}},{"type":"Feature","properties":{"resourceCoords":[1212.0,1347.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.398428,42.273813]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Belchertown, Massachusetts | 1922 | sanborn03689_005 p2 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.21"},{"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":"2026-10-18T11:08:08Z","modified":"2026-10-18T11:08:08Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"177.2,1883.2 167.5,1793.4 1069.8,1801.5 1061.9,1728.4 1120.0,1529.9 1096.0,1502.4 1124.7,1461.1 1520.3,1464.9 1596.3,1259.0 1547.2,801.0 1599.0,437.9 1547.0,76.5 1337.7,52.2 1303.5,72.4 971.3,74.5 799.5,32.0 772.0,56.1 715.4,22.9 55.9,34.4 21.9,77.1 54.4,212.4 39.4,489.8 70.6,566.2 38.5,918.5 70.6,1008.9 20.7,1239.0 21.9,1740.5 41.5,1836.9 177.2,1883.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764bm:g036891922:03689_1922-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[685.0,1314.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.4008958,42.276875]}},{"type":"Feature","properties":{"resourceCoords":[819.0,340.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.4026766,42.2800503]}}]}}]}