{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn02580_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Blairstown, Iowa | 1913 | 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":"3"},{"label":"placed","value":"2"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p1__3 (tier 4, 41.90943,-92.08509 +/-106m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Blairstown, Iowa | 1913 | sanborn02580_001 p1 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"22"},{"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":"2026-09-23T15:28:22Z","modified":"2026-09-23T15:28:22Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5284.0,7652.0 5284.0,6530.4 6452.0,6517.6 6452.0,0.0 -0.0,-0.0 -0.0,1513.5 897.9,1718.5 811.5,2082.5 -0.0,1892.1 0.0,6401.6 2712.0,6400.8 2702.0,7652.0 5284.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4560.0,6720.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0826553,41.9074934]}},{"type":"Feature","properties":{"resourceCoords":[3104.0,2236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.084455,41.909646]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Blairstown, Iowa | 1913 | sanborn02580_001 p1 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6400.8"},{"label":"split_canvas_w","value":"2712.0"},{"label":"split_canvas_h","value":"1251.2"}],"created":"2026-09-23T15:28:22Z","modified":"2026-09-23T15:28:22Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1348.0,7440.1 826.1,7443.2 630.2,6608.8 2.4,6401.6 0.0,6401.6 -0.0,7652.0 1347.4,7652.0 1348.0,7440.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154bm:g025801913:02580_1913-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1348.0,7440.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.0860954,41.9096326]}},{"type":"Feature","properties":{"resourceCoords":[2632.0,7440.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.084455,41.909646]}}]}}]}