{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn02761_005.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mount Vernon, Iowa | 1941 | 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"},{"label":"pages","value":"7"},{"label":"placed","value":"3"},{"label":"unplaced","value":"4"},{"label":"fit sources","value":"georef 2, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p1__1 (tier 1, 42.03933,-91.60164 +/-322m); p1__2 (tier 1, 41.92494,-91.42094 +/-295m); p4__2 (tier 1, 41.97429,-91.68368 +/-157m); p5 (tier 2, 41.92593,-91.41760 +/-219m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Iowa | 1941 | sanborn02761_005 p2","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"22"}],"created":"2026-09-23T15:47:15Z","modified":"2026-09-23T15:47:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"61.6,1913.0 20.1,212.7 1584.8,196.3 1574.0,1710.0 1056.1,1709.2 1055.1,1913.0 61.6,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[554.0,1210.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.417769,41.921501]}},{"type":"Feature","properties":{"resourceCoords":[555.0,193.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.419809,41.922598]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Iowa | 1941 | sanborn02761_005 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T15:47:15Z","modified":"2026-09-23T15:47:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.0,1488.5 107.2,216.9 698.1,200.0 658.3,146.2 859.5,0.0 1613.0,0.0 1613.0,1913.0 -0.0,1913.0 -0.0,1489.8 125.0,1488.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.42146076548897,41.92536683018588]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.41676206161549,41.93008441953458]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.40929470652854,41.92590907217579]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.41399341040203,41.92119148282709]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Iowa | 1941 | sanborn02761_005 p4 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"19"},{"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":"2026-09-23T15:47:15Z","modified":"2026-09-23T15:47:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0004__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"481.0,1913.0 699.0,1913.0 1613.0,1913.0 1613.0,1311.0 783.1,1310.1 783.1,737.9 1613.0,734.2 1613.0,-0.0 -0.0,0.0 -0.0,1913.0 481.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154mm:g027611941:02761_1941-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[960.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.4165752,41.9243333]}},{"type":"Feature","properties":{"resourceCoords":[709.0,659.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.417578,41.924877]}}]}}]}