{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02824_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Shellsburg, Iowa | 1913 | 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":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p2__1 (tier 1, 42.09497,-91.87133 +/-100m); p2__3 (tier 1, 42.09249,-91.86890 +/-100m); p2__4 (tier 1, 42.09505,-91.86871 +/-195m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Shellsburg, Iowa | 1913 | sanborn02824_001 p1","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.85"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T21:05:28Z","modified":"2026-10-18T21:05:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1.0,685.2 1.0,913.1 39.6,913.5 38.6,1587.4 145.2,1762.6 795.9,1879.2 1564.3,1852.4 1503.9,866.2 1570.9,722.1 1581.8,425.2 1492.0,61.8 789.5,31.5 592.9,116.0 332.9,40.4 131.4,41.4 123.3,195.4 108.1,195.4 121.0,685.3 1.0,685.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1553.0,1655.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.868122,42.093679]}},{"type":"Feature","properties":{"resourceCoords":[1078.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.8693435,42.0954722]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Shellsburg, Iowa | 1913 | sanborn02824_001 p2 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.73"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"2692.8"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3759.2"},{"label":"split_canvas_h","value":"3588.0"}],"created":"2026-10-18T21:05:28Z","modified":"2026-10-18T21:05:28Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1383.2,666.0 1504.2,666.1 1491.5,176.3 1506.8,176.3 1514.8,22.2 861.3,25.1 857.5,329.3 695.7,515.6 700.2,733.1 727.6,782.5 732.8,782.5 752.4,782.5 752.4,782.5 752.8,827.8 785.2,886.3 1383.1,892.9 1383.2,666.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154sm:g028241913:02824_1913-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[673.2,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.87385058454558,42.09667243360722]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.87149269664809,42.09669449739776]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,897.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.87146433052278,42.0950244359871]}},{"type":"Feature","properties":{"resourceCoords":[673.2,897.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.87382221842027,42.095002372196554]}},{"type":"Feature","properties":{"resourceCoords":[854.1,176.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-91.873391,42.096349]}}]}}]}