{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03814_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Northfield, Massachusetts | 1902 | 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":"11"},{"label":"placed","value":"2"},{"label":"unplaced","value":"9"},{"label":"fit sources","value":"georef 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 11 panels"},{"label":"unplaced pages","value":"p1__1 (tier 1, 42.69749,-72.45464 +/-169m); p2__1 (tier 4, 42.69700,-72.45484 +/-319m); p2__2 (tier 4, 42.69700,-72.45484 +/-319m); p2__3 (tier 4, 42.69700,-72.45484 +/-319m); p2__4 (tier 4, 42.69700,-72.45484 +/-319m); p2__5 (tier 4, 42.69700,-72.45484 +/-319m); p2__6 (tier 4, 42.69700,-72.45484 +/-319m); p2__7 (tier 4, 42.69700,-72.45484 +/-319m); p2__8 (tier 4, 42.69700,-72.45484 +/-319m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Northfield, Massachusetts | 1902 | sanborn03814_001 p1 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.26"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"3210.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3241.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-10-18T13:08:16Z","modified":"2026-10-18T13:08:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"891.5,1538.9 1088.8,1810.3 1326.7,1870.5 1598.8,1702.2 1496.5,1288.0 1585.5,941.2 1513.2,152.7 1572.1,72.3 1498.0,30.6 1115.6,111.7 916.4,76.6 871.6,142.1 953.6,1064.5 891.5,1538.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1224.3,879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.4561431,42.6944168]}},{"type":"Feature","properties":{"resourceCoords":[1224.3,971.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.456206,42.6942904]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Northfield, Massachusetts | 1902 | sanborn03814_001 p1 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.78"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"1563.2"},{"label":"split_canvas_y","value":"6176.0"},{"label":"split_canvas_w","value":"1700.0"},{"label":"split_canvas_h","value":"1476.0"}],"created":"2026-10-18T13:08:16Z","modified":"2026-10-18T13:08:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"411.4,1589.6 397.7,1904.4 796.8,1909.5 781.5,1565.3 411.4,1589.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764nm:g038141902:03814_1902-0001__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[390.8,1544.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-72.45374561630396,42.700036056805885]}},{"type":"Feature","properties":{"resourceCoords":[815.8,1544.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-72.45294084937349,42.69984248091717]}},{"type":"Feature","properties":{"resourceCoords":[815.8,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-72.4531685895494,42.69932924709798]}},{"type":"Feature","properties":{"resourceCoords":[390.8,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-72.45397335647988,42.699522822986694]}},{"type":"Feature","properties":{"resourceCoords":[502.5,1833.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-72.4537124,42.6995832]}}]}}]}