{"id":"https://data.mapsnap.org/runs/v1.3/iiif/chronoscope/sanborn03389_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Barrow, Louisiana | 1922 | 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":"5"},{"label":"placed","value":"4"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef 4"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 4 panels"},{"label":"unplaced pages","value":"p2__4 (tier 1, 30.10489,-90.99707 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p1","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"13"}],"created":"2026-09-21T22:23:59Z","modified":"2026-09-21T22:23:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1613.0,553.1 1601.1,1901.8 -0.0,1913.0 -0.0,0.0 1613.0,-0.0 1613.0,553.1 1613.0,553.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[692.0,1020.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.994197,30.107576]}},{"type":"Feature","properties":{"resourceCoords":[1144.0,1167.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.993496,30.106949]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [1]","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"},{"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":"2026-09-21T22:23:59Z","modified":"2026-09-21T22:23:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,985.3 527.4,985.4 531.8,1621.2 622.7,1621.3 623.6,1913.0 1179.0,1913.0 1466.0,1913.0 1613.0,1913.0 1613.0,-0.0 1529.1,-0.0 1527.5,39.0 -0.0,15.8 0.0,985.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[616.0,942.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.995939,30.104643]}},{"type":"Feature","properties":{"resourceCoords":[161.0,1396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.997224,30.104277]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"3941.2"},{"label":"split_canvas_w","value":"2127.2"},{"label":"split_canvas_h","value":"2543.6"}],"created":"2026-09-21T22:23:59Z","modified":"2026-09-21T22:23:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1620.3 384.0,1620.9 531.8,1621.2 527.4,985.4 0.0,985.3 0.0,1620.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[59.0,1439.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.997707,30.108847]}},{"type":"Feature","properties":{"resourceCoords":[494.8,1439.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.99669,30.108718]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Barrow, Louisiana | 1922 | sanborn03389_002 p2 [3]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"6481.2"},{"label":"split_canvas_w","value":"1546.8"},{"label":"split_canvas_h","value":"1170.8"}],"created":"2026-09-21T22:23:59Z","modified":"2026-09-21T22:23:59Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,1913.0 386.7,1913.0 384.0,1620.9 0.0,1620.3 -0.0,1913.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd401m:g4014m:g4014pm:g033891922:03389_1922-0002__3/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1620.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.9981062675904,30.102388600086776]}},{"type":"Feature","properties":{"resourceCoords":[386.7,1620.3],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.9973673335362,30.10207832872234]}},{"type":"Feature","properties":{"resourceCoords":[386.7,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99763926668894,30.10159504904797]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-90.99837820074313,30.101905320412406]}},{"type":"Feature","properties":{"resourceCoords":[363.7,1846.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-90.997621,30.101724]}}]}}]}