{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn02707_004.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"La Porte City, Iowa | 1927 | mapsnap generated fit (2026-10-19)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-19"},{"label":"run","value":"corpus-v2"},{"label":"pages","value":"11"},{"label":"placed","value":"6"},{"label":"unplaced","value":"5"},{"label":"fit sources","value":"georef 5, georef-snap 1"},{"label":"key map","value":"none"},{"label":"split sheets","value":"2 sheet(s) cut into 8 panels"},{"label":"unplaced pages","value":"p1__1 (tier 4, 42.31448,-92.18907 +/-461m); p1__3 (tier 4, 42.31448,-92.18907 +/-461m); p1__4 (tier 4, 42.31448,-92.18907 +/-461m); p1__6 (tier 4, 42.31448,-92.18907 +/-461m); p5__2 (tier 1, 42.31615,-92.19125 +/-100m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p1 [2]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.75"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4642.4"},{"label":"split_canvas_w","value":"2506.0"},{"label":"split_canvas_h","value":"3009.6"}],"created":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"35.7,1879.6 606.6,1817.9 588.0,1262.0 393.4,1203.8 34.5,1242.7 88.9,1286.3 31.2,1332.1 35.7,1879.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,1160.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.19078512351864,42.31771974329067]}},{"type":"Feature","properties":{"resourceCoords":[626.5,1160.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.18947528794227,42.31709706424377]}},{"type":"Feature","properties":{"resourceCoords":[626.5,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.19049099484113,42.315935203929314]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.19180083041749,42.31655788297621]}},{"type":"Feature","properties":{"resourceCoords":[419.3,1841.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.190827,42.3162522]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__5/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p1 [5]","metadata":[{"label":"streets","value":"2"},{"label":"intersections","value":"1"},{"label":"confidence","value":"0.82"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"4436.0"},{"label":"split_canvas_y","value":"6046.4"},{"label":"split_canvas_w","value":"2016.0"},{"label":"split_canvas_h","value":"1605.6"}],"created":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__5/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1567.7,1899.5 1580.3,1790.3 1492.3,1792.2 1502.9,1601.1 1399.4,1559.3 1298.0,1612.8 1172.0,1549.5 1127.0,1844.0 1567.7,1899.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0001__5/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[1109.0,1511.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.18634474980956,42.31696979746473]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1511.6],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.18509033247209,42.31695002178209]}},{"type":"Feature","properties":{"resourceCoords":[1613.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.18511172245846,42.31621219560869]}},{"type":"Feature","properties":{"resourceCoords":[1109.0,1913.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-92.18636613979594,42.31623197129133]}},{"type":"Feature","properties":{"resourceCoords":[1564.0,1857.1],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1852307,42.3163169]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p2","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0002/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0002","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"58.4,313.1 52.3,83.2 202.1,32.4 1230.7,43.7 1515.9,98.1 1611.4,401.6 1558.6,1006.1 1611.1,1172.2 1588.5,1783.6 1612.0,1806.8 978.0,1805.9 286.2,1811.2 75.8,1813.3 73.7,445.1 58.6,445.2 33.3,333.0 58.4,313.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0002/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[509.0,900.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1926749,42.3140574]}},{"type":"Feature","properties":{"resourceCoords":[509.0,1351.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1917244,42.3136156]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p3","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"18"},{"label":"confidence","value":"0.80"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0003/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0003","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1508.6,146.9 1523.0,147.0 1508.3,1453.9 1539.7,1454.0 1498.0,1884.8 1386.6,1884.1 1382.4,1884.6 54.0,1853.7 26.3,197.2 77.8,26.3 1459.8,59.7 1485.8,39.5 1508.6,146.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[365.0,1324.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1931663,42.3107378]}},{"type":"Feature","properties":{"resourceCoords":[1523.0,147.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1942104,42.3138247]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p4","metadata":[{"label":"streets","value":"12"},{"label":"intersections","value":"24"},{"label":"confidence","value":"0.79"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0004/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0004","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"539.8,1865.7 542.6,1888.0 1575.2,1866.7 1550.2,490.7 1612.0,469.2 1612.0,430.0 1404.8,434.3 1392.7,35.8 1391.6,1.0 1361.4,1.0 1362.2,55.4 99.5,50.4 49.9,82.9 25.9,316.0 46.3,315.6 58.0,957.0 77.0,1656.6 82.3,1836.2 539.8,1865.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1214.0,1602.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1886371,42.3117658]}},{"type":"Feature","properties":{"resourceCoords":[58.0,957.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.1901444,42.3139008]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0005__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Porte City, Iowa | 1927 | sanborn02707_004 p5 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"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":"2026-10-19T21:52:53Z","modified":"2026-10-19T21:52:53Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0005__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0005","type":"ImageService3","width":1613,"height":1913},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"43.3,1449.1 46.6,1843.5 251.6,1843.8 251.7,1882.2 361.8,1846.5 1565.2,1865.7 1576.3,1858.5 1590.1,369.1 1578.8,351.0 1350.8,328.9 1286.2,31.9 68.7,48.9 22.8,155.4 13.2,1400.1 42.9,1400.0 43.3,1449.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd415m:g4154m:g4154lm:g027071927:02707_1927-0005__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,1405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.18526699406459,42.31365481799832]}},{"type":"Feature","properties":{"resourceCoords":[58.0,1405.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-92.18606635838621,42.314024239480474]}}]}}]}