{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03684_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Ayer, Massachusetts | 1887 | mapsnap generated fit (2026-10-17)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-17"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"5"},{"label":"placed","value":"2"},{"label":"unplaced","value":"3"},{"label":"fit sources","value":"georef 1, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p2__1 (tier 1, 42.55508,-71.58050 +/-132m); p2__2 (tier 4, 42.55958,-71.58976 +/-154m); p2__3 (tier 4, 42.55958,-71.58976 +/-154m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ayer, Massachusetts | 1887 | sanborn03684_001 p1","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-17T05:53:04Z","modified":"2026-10-17T05:53:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"71.8,1224.0 77.4,268.1 51.5,268.4 105.7,44.6 1533.2,55.5 1591.8,578.0 1554.0,1838.5 1307.0,1893.4 938.0,1845.2 546.1,1883.7 83.0,1827.1 50.0,1224.4 50.0,1223.8 71.8,1224.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[998.0,95.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.587444,42.5610076]}},{"type":"Feature","properties":{"resourceCoords":[1210.0,1909.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.58685,42.557636]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0002__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Ayer, Massachusetts | 1887 | sanborn03684_001 p2 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.50"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3681.6"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"3970.4"}],"created":"2026-10-17T05:53:04Z","modified":"2026-10-17T05:53:04Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0002__4/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1557.5,921.7 1539.2,922.1 1532.3,952.3 758.6,943.1 713.4,1018.1 442.9,1025.0 435.3,1092.6 157.4,1054.5 97.5,979.2 37.4,1016.7 80.5,1910.3 1545.3,1868.4 1548.1,1912.0 1570.8,1912.0 1566.1,921.5 1557.5,921.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764am:g036841887:03684_1887-0002__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1364.0,1268.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.59025574167255,42.56003987424845]}},{"type":"Feature","properties":{"resourceCoords":[346.0,1080.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.59273880168615,42.56037352756216]}}]}}]}