{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03792_003.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Millbury, Massachusetts | 1899 | key map | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Millbury, Massachusetts | 1899 | sanborn03792_003 p1 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3583.9"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"4490.2"}],"created":"2026-09-23T23:58:20Z","modified":"2026-09-23T23:58:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1913 1613,1913 1613,908.0 916.6,896.0 0.0,1246.2 0.0,1913\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1029.4,1670.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.793018,42.578186]}},{"type":"Feature","properties":{"resourceCoords":[-278.6,1670.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.8642709,42.1207501]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Millbury, Massachusetts | 1899 | sanborn03792_003 p1 [2]","metadata":[{"label":"streets","value":"14"},{"label":"intersections","value":"18"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6878.4"},{"label":"split_canvas_h","value":"4985.0"}],"created":"2026-09-23T23:58:20Z","modified":"2026-09-23T23:58:20Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1246.2 916.6,896.0 1613,908.0 1613,508.6 1613,295.6 1613,0.0 438.1,0.0 215.3,0.0 -0.0,0.0 -0.0,1246.2 0.0,1246.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd376m:g3764m:g3764mm:g037921899:03792_1899-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[954.5,316.8],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.763308,42.193355]}},{"type":"Feature","properties":{"resourceCoords":[1045.3,395.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-71.760776,42.19216]}}]}}]}