{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn01751_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Brookport, Illinois | 1921 | 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":"3"},{"label":"placed","value":"2"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef-snap 1, georef 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"1 sheet(s) cut into 2 panels"},{"label":"unplaced pages","value":"p2__2 (tier 1, 37.12553,-88.62591 +/-182m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brookport, Illinois | 1921 | sanborn01751_001 p1","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-21T19:57:01Z","modified":"2026-09-21T19:57:01Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6299.0,873.3 6419.3,3020.5 6272.9,4021.6 6251.0,6953.7 6452.0,6956.7 6452.0,7652.0 -0.0,7652.0 -0.0,-0.0 6452.0,0.0 6452.0,875.5 6299.0,873.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0001/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.63161552450659,37.12584719293101]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.62768437942198,37.12567778795254]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.62793459465614,37.12193415984775]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-88.63186573974075,37.12210356482622]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0002__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Brookport, Illinois | 1921 | sanborn01751_001 p2 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"1688.4"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"5963.6"}],"created":"2026-09-21T19:57:01Z","modified":"2026-09-21T19:57:01Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0002__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0002/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5048.0,7652.0 6452.0,7652.0 6452.0,2579.2 3736.0,2573.2 3721.6,1713.2 117.3,1689.2 267.0,3792.4 140.0,4776.2 163.6,7652.0 5048.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd410m:g4104m:g4104bm:g017511921:01751_1921-0002__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2120.0,6536.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.626762,37.12277]}},{"type":"Feature","properties":{"resourceCoords":[140.0,4776.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-88.627925,37.123715]}}]}}]}