{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn00188_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Alpena, Arkansas | 1919 | mapsnap generated fit (2026-09-21)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-21"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"2"},{"label":"placed","value":"2"},{"label":"unplaced","value":"0"},{"label":"fit sources","value":"georef 2"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 2 panels"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Arkansas | 1919 | sanborn00188_002 p1 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"8"},{"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":"2026-09-21T09:41:15Z","modified":"2026-09-21T09:41:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,1913.0 1613.0,733.7 1152.0,737.0 1145.0,459.5 911.0,459.7 912.0,52.0 912.0,0.0 -0.0,-0.0 -0.0,1123.9 18.9,1123.9 -0.0,1913.0 1613.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[744.0,1706.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.292326,36.293516]}},{"type":"Feature","properties":{"resourceCoords":[1272.0,752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.29151,36.295341]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Alpena, Arkansas | 1919 | sanborn00188_002 p1 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"3644.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2808.0"},{"label":"split_canvas_h","value":"2948.0"}],"created":"2026-09-21T09:41:15Z","modified":"2026-09-21T09:41:15Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"912.0,0.0 912.0,52.0 911.0,459.7 1145.0,459.5 1152.0,737.0 1591.2,733.9 1594.7,-0.0 912.0,0.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd400m:g4004m:g4004am:g001881919:00188_1919-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[911.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.29566442486465,36.294236790421145]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.29413437419774,36.29444613540161]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,737.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.29386204322326,36.29315344164821]}},{"type":"Feature","properties":{"resourceCoords":[911.0,737.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.29539209389017,36.292944096667746]}},{"type":"Feature","properties":{"resourceCoords":[1225.5,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.2949563,36.2942236]}},{"type":"Feature","properties":{"resourceCoords":[1225.5,61.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.2949563,36.2942236]}}]}}]}