{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02663_002.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Fort Madison, Iowa | 1889 | 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":"14"},{"label":"placed","value":"1"},{"label":"unplaced","value":"13"},{"label":"fit sources","value":"snap:1 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"1 sheet(s) cut into 3 panels"},{"label":"unplaced pages","value":"p10 (tier 4, 40.52967,-91.41695 +/-100m); p11 (tier 4, 40.52967,-91.41695 +/-100m); p12 (tier 4, 40.52967,-91.41695 +/-100m); p13 (tier 4, 40.52967,-91.41695 +/-100m); p2 (tier 4, 40.52967,-91.41695 +/-100m); p4 (tier 1, 40.52927,-91.41664 +/-385m); p5 (tier 1, 40.52989,-91.41566 +/-385m); p6 (tier 4, 40.52967,-91.41695 +/-100m); p7 (tier 1, 40.66820,-91.50899 +/-247m); p8 (tier 1, 40.63187,-91.30582 +/-379m); p9__1 (tier 4, 40.52967,-91.41695 +/-100m); p9__2 (tier 4, 40.52967,-91.41695 +/-100m); p9__3 (tier 4, 40.52967,-91.41695 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154fm:g026631889:02663_1889-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Fort Madison, Iowa | 1889 | sanborn02663_002 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.09"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T22:13:14Z","modified":"2026-10-18T22:13:14Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154fm:g026631889:02663_1889-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154fm:g026631889:02663_1889-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"41.5,1709.3 54.8,153.4 120.0,30.5 701.9,14.9 837.5,65.5 1013.2,17.0 1397.4,14.0 1556.3,82.8 1595.3,256.4 1553.6,540.7 1593.0,745.6 1597.2,1258.6 1567.5,1583.4 1591.4,1776.2 1549.5,1861.5 1335.0,1879.5 1045.2,1826.1 889.3,1865.2 606.4,1811.0 447.4,1854.0 81.4,1833.9 25.9,1753.0 41.5,1709.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154fm:g026631889:02663_1889-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.42136439799201,40.530370713465544]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.41679115002451,40.53311890375819]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.4125330415909,40.52896729862836]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-91.4171062895584,40.52621910833572]}}]}}]}