{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn02629_015.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Des Moines, Iowa | 1957 | mapsnap generated fit (2026-09-22)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-22"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"75"},{"label":"placed","value":"63"},{"label":"unplaced","value":"12"},{"label":"fit sources","value":"georef 37, georef-snap 24, snap:0 2"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"13 sheet(s) cut into 28 panels"},{"label":"unplaced pages","value":"p0__1 (tier 1, 41.60716,-93.64106 +/-185m); p0__2 (tier 1, 41.61736,-93.67142 +/-314m); p314__1 (tier 1, 41.61549,-93.64166 +/-186m); p320__1 (tier 1, 41.60165,-93.61829 +/-210m); p322__1 (tier 1, 41.60913,-93.64587 +/-207m); p331 (tier 2, 41.61327,-93.64598 +/-100m); p332__1 (tier 1, 41.60981,-93.62571 +/-534m); p332__2 (tier 2, 41.61667,-93.66331 +/-3240m); p336 (tier 1, 41.60706,-93.63312 +/-532m); p342__2 (tier 1, 41.60965,-93.61513 +/-125m); p386__1 (tier 1, 41.60301,-93.64313 +/-146m); p388__2 (tier 4, 41.61049,-93.64983 +/-4400m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0301/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p301","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0301/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0301/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,6364.8 -0.0,6350.4 0.0,-0.0 2303.6,0.0 2262.1,3288.9 6600.0,3295.3 6600.0,6364.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0301/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2268.0,2472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6535752,41.6058981]}},{"type":"Feature","properties":{"resourceCoords":[6352.0,6364.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.650935,41.604046]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0302/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p302","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0302/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0302/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6485.1,8040.0 -0.0,8040.0 -0.0,0.0 6394.7,0.0 6485.1,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0302/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6400.0,4604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.65094,41.601736]}},{"type":"Feature","properties":{"resourceCoords":[6400.0,7460.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.650945,41.600394]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0303/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p303","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0303/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0303/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2080.2,5911.8 136.8,5965.5 -0.0,5227.6 129.3,5225.4 129.3,5225.1 380.5,5221.1 320.6,2134.1 3654.5,2075.4 4542.0,1314.6 6600.0,1280.4 6600.0,8040.0 2103.4,8040.0 2080.2,5911.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0303/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65097799653311,41.60653967604132]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64679628567683,41.606502659344706]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64685616855844,41.60266670706769]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65103787941473,41.60270372376431]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0304/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p304","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0304/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0304/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"49.1,0.0 1943.0,0.0 1908.4,2072.9 6281.5,2193.6 6107.3,8014.7 -0.0,8040.0 49.1,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0304/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6509677277095,41.60369234564002]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6466752312564,41.60374358874256]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64659233765293,41.59980583485774]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65088483410604,41.5997545917552]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0305/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p305","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0305/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0305/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,1300.7 6600.0,8040.0 238.4,8040.0 339.2,1284.3 440.0,1434.7 440.0,1284.0 6600.0,1300.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0305/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[440.0,5212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.646737,41.604062]}},{"type":"Feature","properties":{"resourceCoords":[440.0,1284.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.646743,41.605892]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0306/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p306","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0306/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0306/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"79.6,2173.9 6055.7,2156.4 6049.2,0.0 6398.9,0.0 6600.0,8040.0 -0.0,8040.0 79.6,2173.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0306/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64691036905971,41.603830052454875]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64253294388249,41.603828396209856]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64253562311855,41.59981273965809]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64691304829577,41.59981439590311]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0307/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p307","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0307/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0307/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"338.7,5385.9 -0.0,5384.3 -0.0,926.3 369.1,927.4 373.7,0.0 4282.3,0.0 4280.0,936.0 6224.1,958.7 6217.5,5868.5 328.9,5858.8 338.7,5385.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0307/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4280.0,936.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.640232,41.60589]}},{"type":"Feature","properties":{"resourceCoords":[6216.0,6848.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.639028,41.603156]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0308/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p308","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0308/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0308/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"527.4,0.0 6300.4,0.0 6300.8,1314.6 6600.0,1315.3 6600.0,8040.0 743.2,8040.0 712.4,6772.2 692.0,6772.0 527.4,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0308/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4488.0,6772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.640172,41.600413]}},{"type":"Feature","properties":{"resourceCoords":[692.0,6772.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.642568,41.600413]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0309/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p309","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0309/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0309/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6470.2,65.1 6600.0,65.0 6600.0,7357.3 -0.0,7374.0 -0.0,7231.8 327.2,7232.8 325.0,3449.7 -0.0,3451.6 -0.0,0.0 2254.3,-0.0 2253.7,1527.7 4248.3,1524.6 4248.9,1010.6 6471.7,1002.6 6470.2,65.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0309/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63451309320584,41.60602413417976]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6345225671913,41.602980804739985]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6394458305157,41.60298949540164]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63943635653024,41.606032824841414]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0310/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p310","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0310/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0310/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"688.7,-0.0 6600.0,-0.0 6600.0,7000.6 682.9,7009.6 688.7,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0310/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63456174764222,41.60329731286253]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63456781656492,41.600265009943996]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63947303628231,41.60027057731228]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63946696735961,41.603302880230814]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0311/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p311","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0311/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0311/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,7527.5 4388.0,7532.0 4386.6,8040.0 2401.6,8040.0 2404.6,6530.3 756.6,6527.8 757.7,6279.4 1387.2,6281.7 1388.0,6047.3 480.6,6048.8 488.7,203.2 -0.0,205.3 -0.0,0.0 6600.0,-0.0 6600.0,7527.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0311/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[476.0,4084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6329995,41.6058774]}},{"type":"Feature","properties":{"resourceCoords":[4388.0,7532.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.635138,41.604066]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0312/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p312","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"13"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0312/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0312/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6594.6,6559.4 648.5,6586.3 617.2,622.4 1316.9,621.6 1316.0,208.0 6173.8,169.2 6121.8,-0.0 6600.0,-0.0 6594.6,6559.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0312/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2260.0,7492.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6351337,41.602291]}},{"type":"Feature","properties":{"resourceCoords":[1316.0,208.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.630583,41.6027112]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0313/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p313","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0313/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0313/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2405.0,8040.0 2393.2,6799.7 49.7,6810.4 -0.0,6683.1 599.7,6680.7 578.5,1533.3 2342.1,1528.6 2332.3,528.7 6600.0,509.6 6600.0,5289.8 6303.8,5294.4 6329.7,8040.0 2405.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0313/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63081903377777,41.60612111872479]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62677637034759,41.60610621494509]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62680048045759,41.60239779385068]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63084314388777,41.60241269763038]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0314__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p314 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"5980.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0314__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0314/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"376.1,5471.8 546.7,5420.4 544.0,5902.1 2272.3,5927.7 2560.8,5920.4 2560.4,4850.4 5789.1,4926.5 5748.2,1250.2 2322.0,1234.3 2316.9,0.0 481.2,0.0 403.6,0.0 -0.0,-0.0 -0.0,577.9 364.9,579.2 376.1,5471.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0314__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4264.0,4676.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6281669,41.6008118]}},{"type":"Feature","properties":{"resourceCoords":[2320.0,584.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6293711,41.6027087]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0315/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p315","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0315/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0315/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5743.0,6236.9 555.9,6327.1 548.3,1605.5 5687.5,1563.6 5743.0,6236.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0315/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62711145616777,41.60662250163202]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62301872377931,41.60660246173835]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62305114289299,41.602848136869994]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62714387528145,41.602868176763664]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0316/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p316","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0316/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0316/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,2738.6 457.5,2745.8 474.6,0.0 6023.9,0.0 5942.6,379.0 6600.0,408.9 6600.0,8040.0 -0.0,8040.0 -0.0,2738.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0316/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62726452962377,41.60366246589298]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62322248308344,41.603695591998694]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62316889643614,41.59998759534321]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62721094297648,41.599954469237495]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0317/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p317","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0317/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0317/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7213.4 -0.0,5265.3 -0.0,2102.1 2201.9,0.0 4145.4,0.0 6150.7,2158.9 6168.5,7257.2 4345.1,7251.4 672.0,7232.0 -0.0,7213.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0317/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4152.0,2140.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6210255,41.605868]}},{"type":"Feature","properties":{"resourceCoords":[672.0,7232.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6231588,41.603507]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0318/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p318","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0318/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0318/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"688.2,0.0 4377.6,0.0 4373.9,400.1 6204.5,411.3 6204.2,2898.0 6600.0,2899.9 6212.3,4693.6 6213.0,6239.4 6039.8,7486.8 6338.4,7490.4 6349.1,8040.0 607.1,8017.3 587.4,369.1 686.5,370.0 688.2,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0318/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3320.0,3160.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.621524,41.602234]}},{"type":"Feature","properties":{"resourceCoords":[3320.0,396.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.621538,41.603505]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0319/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p319","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0319/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0319/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"263.3,1091.6 6253.8,1135.5 6256.7,1790.3 6600.0,1788.5 6600.0,8040.0 4357.3,8040.0 299.3,8040.0 263.3,1091.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0319/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61995087971475,41.60607696114725]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61590337754316,41.60608741084063]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61588647289705,41.60237454907299]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61993397506863,41.60236409937961]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0320__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p320 [2]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"436.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6163.6"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0320__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0320/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"604.6,7995.8 603.6,8040.0 6600.0,8040.0 6600.0,0.0 5771.0,0.0 6109.8,1533.6 579.0,2756.0 599.6,3124.8 679.6,4558.0 657.2,5583.9 774.8,6102.9 879.8,7346.2 1169.1,7284.4 1299.5,7813.2 604.6,7995.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0320__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3064.2,6700.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.618417,41.60033]}},{"type":"Feature","properties":{"resourceCoords":[2292.3,3192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6184227,41.6019985]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0321/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p321","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"7"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0321/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0321/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,7085.7 6449.2,7188.3 6457.2,8040.0 -0.0,8040.0 -0.0,0.0 506.5,-0.0 493.3,1179.6 1014.8,1177.8 1546.0,746.7 2468.0,484.0 2466.2,-0.0 5489.6,-0.0 5492.5,474.2 6420.3,473.0 6448.2,7086.7 6600.0,7085.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0321/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1300.0,4192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.644938,41.608267]}},{"type":"Feature","properties":{"resourceCoords":[2468.0,484.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6426477,41.607719]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0322__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p322 [2]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"split_canvas_x","value":"421.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6178.4"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0322__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0322/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4540.0,7270.5 4992.2,6882.4 5615.6,6874.0 5602.7,3669.6 6600.0,3665.6 6600.0,865.9 6153.5,861.1 6162.4,0.0 1057.6,0.0 1201.5,6815.1 760.7,6824.5 792.0,7325.2 4540.0,7270.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0322__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3924.7,4928.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.64942,41.607717]}},{"type":"Feature","properties":{"resourceCoords":[3924.7,1004.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.649378,41.611374]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0323/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p323","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0323/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0323/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8040.0 0.0,0.0 2315.7,-0.0 5831.2,483.2 6600.0,482.6 6600.0,736.4 5995.9,738.2 6334.4,4220.3 6347.9,8040.0 -0.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0323/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63404612940622,41.608760452443214]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63406736169631,41.60574647899669]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63894334608518,41.605765954925616]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63892211379509,41.60877992837214]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0324/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p324","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0324/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0324/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6333.4,3446.9 5398.1,3447.1 5407.6,6878.9 2387.9,6859.8 2388.0,7352.0 1676.6,7509.3 934.2,8040.0 395.8,8040.0 428.9,4978.5 -0.0,4977.2 -0.0,2620.8 426.3,2624.2 434.3,-0.0 2391.5,-0.0 2388.4,1348.2 6024.5,1363.3 6024.4,1503.9 6350.7,1504.3 6333.4,3446.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0324/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2388.0,3448.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.64023,41.607717]}},{"type":"Feature","properties":{"resourceCoords":[2388.0,7352.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6426477,41.607719]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0325/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p325","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"9"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0325/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0325/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,3214.8 473.1,3213.4 474.8,942.9 -0.0,942.5 -0.0,-0.0 6011.6,0.0 6014.1,112.1 5477.1,113.3 5484.2,3212.0 6012.9,3212.0 6043.9,7123.6 228.4,7137.2 233.2,8040.0 -0.0,8040.0 -0.0,3214.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0325/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4104.0,3212.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.631792,41.607696]}},{"type":"Feature","properties":{"resourceCoords":[4104.0,7124.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.631803,41.605874]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0326/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p326","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0326/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0326/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2496.0,7044.0 2503.0,8040.0 758.6,8040.0 756.5,6563.1 551.1,6563.4 531.8,3117.9 -0.0,3116.7 -0.0,-0.0 540.2,0.0 548.4,406.3 6353.7,389.2 6389.3,7037.6 2496.0,7044.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0326/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2496.0,7044.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.629392,41.605872]}},{"type":"Feature","properties":{"resourceCoords":[4424.0,412.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.628189,41.608941]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0327/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p327","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0327/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0327/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6144.5,7139.5 329.8,7113.4 349.1,440.5 2322.5,456.8 2321.3,1089.2 5946.3,1111.3 6154.8,3051.5 6144.5,7139.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0327/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62720954601366,41.609151834640734]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62316582208082,41.60917035034847]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62313586749075,41.60546112976486]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62717959142358,41.605442614057125]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0328/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p328","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"11"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0328/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0328/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4442.0,7174.2 4446.2,8040.0 631.3,8040.0 633.5,3115.6 426.1,1184.7 6402.6,1261.9 6411.4,7192.9 4442.0,7174.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0328/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[624.0,3280.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6234326,41.6076842]}},{"type":"Feature","properties":{"resourceCoords":[2524.0,7156.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6222282,41.6058717]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0329/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p329","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0329/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0329/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"380.1,7772.4 393.6,0.0 6564.7,0.0 6564.8,200.4 5796.2,196.7 5801.2,7838.3 380.1,7772.4\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0329/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62006241658794,41.609196312487775]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61597500844691,41.60922184610315]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61593370032,41.60547255603469]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62002110846103,41.60544702241931]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p330 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"480.0,8040.0 558.4,8040.0 6600.0,8040.0 6600.0,6791.6 6600.0,2826.4 5808.8,2829.2 4097.2,2838.0 4110.0,0.0 723.9,0.0 723.9,175.1 -0.0,171.2 0.0,742.0 0.0,1480.4 0.0,3510.0 0.0,4272.0 -0.0,7418.7 480.7,7425.0 480.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4076.0,3128.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6137743,41.607691]}},{"type":"Feature","properties":{"resourceCoords":[4076.0,7472.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6137489,41.6055551]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p330 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"4097.2"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2502.8"},{"label":"split_canvas_h","value":"2838.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,-0.0 4110.0,0.0 4097.2,2838.0 5808.8,2829.2 6600.0,2826.4 6600.0,2303.0 6600.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0330__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4301.1,2301.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6850888,41.6112597]}},{"type":"Feature","properties":{"resourceCoords":[6308.1,2301.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6826846,41.6112612]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0333/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p333","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0333/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0333/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 6600.0,0.0 6600.0,6658.8 2137.4,6725.4 2157.0,8040.0 -0.0,8040.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0333/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64650168286488,41.61527340774001]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.642375961234,41.615214018144464]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64247205008766,41.611429927736154]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64659777171855,41.6114893173317]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0334/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p334","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0334/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0334/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5318.4,8040.0 2920.4,8040.0 2916.0,6695.8 851.5,6692.3 962.8,0.0 5371.9,0.0 5318.4,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0334/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64297387990484,41.61520939091432]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63887619397708,41.61520174047464]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63888857196659,41.61144337352587]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64298625789435,41.61145102396556]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0335/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p335","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0335/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0335/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4717.5,6903.5 -0.0,6901.9 -0.0,-0.0 6573.4,0.0 6600.0,7398.2 4717.3,7405.7 4717.5,6903.5\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0335/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64524596273355,41.61208880334919]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6411573213851,41.61207592837887]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64117815120231,41.608325645560086]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64526679255077,41.6083385205304]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0337/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p337","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0337/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0337/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,-0.0 6073.4,7.7 6391.0,253.1 6406.6,553.7 6600.0,606.3 6600.0,6704.9 4405.2,6715.1 4407.4,7193.2 651.5,7207.6 652.1,7379.0 -0.0,7382.3 -0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0337/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63963626258071,41.615403078616595]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63158804463085,41.615347736154995]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63167758342125,41.60796578436718]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.63972580137111,41.60802112682878]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0338/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p338","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"4"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0338/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0338/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"981.3,548.2 966.3,246.7 650.4,0.0 6600.0,0.0 6600.0,3216.2 5978.9,3220.7 5934.7,3609.2 4952.7,3518.8 4958.9,4371.8 4723.3,4372.5 4732.3,5607.5 4967.9,5606.0 4977.7,6954.3 2041.7,6977.8 2035.0,6715.3 1162.8,6717.7 1173.8,601.3 981.3,548.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0338/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6108.0,2620.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6255726,41.6129102]}},{"type":"Feature","properties":{"resourceCoords":[3996.0,5612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.628184,41.610185]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0339/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p339","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"18"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0339/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0339/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,0.0 6600.0,8040.0 5990.6,8040.0 6024.9,5819.8 5846.0,5817.1 5845.4,6153.0 4225.3,6146.5 4074.4,5789.7 2719.6,5768.8 2695.7,7314.2 2825.5,8040.0 1776.5,8040.0 1805.3,2621.6 964.6,2614.1 931.0,6544.2 377.2,6546.0 929.6,6735.1 918.0,8040.0 -0.0,8040.0 0.0,-0.0 6600.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0339/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5844.0,3604.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.672017,41.624543]}},{"type":"Feature","properties":{"resourceCoords":[940.0,5540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.677981,41.622706]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0340/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p340","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0340/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0340/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2432.4,8040.0 2429.7,7406.9 468.0,7402.5 468.0,4724.0 -0.0,4723.5 -0.0,2269.9 468.0,2272.0 468.0,577.3 2417.4,771.1 2510.8,0.0 6600.0,0.0 6600.0,8022.0 2432.4,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0340/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[468.0,4724.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.626994,41.610184]}},{"type":"Feature","properties":{"resourceCoords":[468.0,2272.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.626994,41.611314]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0341/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p341","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0341/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0341/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6458.2,8040.0 850.6,8040.0 811.7,0.0 6359.5,0.0 6458.2,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0341/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.62370827610171,41.61234980198873]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61969326341956,41.61232719341622]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.61972984122366,41.60864449071594]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6237448539058,41.608667099288446]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0342__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p342 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0342__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0342/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"433.5,6874.9 6600.0,6877.4 6600.0,2332.0 2524.4,2335.2 2526.8,0.0 458.7,0.0 433.5,6874.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0342__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4436.0,7068.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.617337,41.6091246]}},{"type":"Feature","properties":{"resourceCoords":[4432.0,3288.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.61736,41.6108762]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0343/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p343","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"11"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0343/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0343/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8040.0 -0.0,1790.0 6018.5,1758.0 6013.7,849.5 4722.1,845.3 4538.1,1392.6 4533.4,844.7 644.0,832.0 647.0,-0.0 6600.0,-0.0 6600.0,851.6 6491.4,851.3 6477.1,2810.3 6600.0,2810.5 6600.0,8040.0 -0.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0343/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4060.0,5736.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6840263,41.622182]}},{"type":"Feature","properties":{"resourceCoords":[644.0,832.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.678004,41.625382]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0384/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p384","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0384/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0384/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"565.4,1366.9 971.4,1417.9 971.2,1649.1 825.7,1943.4 882.8,2169.8 3109.3,2196.0 3135.1,0.0 5493.5,0.0 5474.2,1305.6 6026.4,1310.4 6053.1,0.0 6422.7,0.0 6413.4,1490.5 6600.0,1493.5 6600.0,8040.0 -0.0,8040.0 -0.0,1077.7 565.4,1366.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0384/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67001968080628,41.60708979559622]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66193547530632,41.607159487524754]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66182273493203,41.59974357528949]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66990694043199,41.59967388336095]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0385/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p385","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0385/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0385/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3374.7,0.0 3392.2,1422.0 5482.1,1419.7 5460.4,0.0 6600.0,0.0 6600.0,146.7 6155.1,154.0 6209.5,3447.6 6600.0,3442.0 6600.0,3576.5 6258.1,3578.6 6283.0,7661.5 6600.0,7659.6 6600.0,8040.0 706.3,8040.0 575.4,1603.6 389.4,1604.4 386.9,1428.2 2334.8,1405.6 2315.7,0.0 3374.7,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0385/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66260399816484,41.60727039868932]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65449455539127,41.60721607837116]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6545824293584,41.59977703121926]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66269187213197,41.599831351537425]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0386__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p386 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0386__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0386/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,8040.0 6600.0,0.0 -0.0,-0.0 0.0,3832.8 2013.2,4160.0 3668.0,8040.0 6600.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0386__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[824.0,2164.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.653596,41.627723]}},{"type":"Feature","properties":{"resourceCoords":[2300.0,2524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.651447,41.6277242]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p387 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"6"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2999.6"},{"label":"split_canvas_h","value":"4416.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1065.5,0.0 576.1,0.0 772.2,105.9 823.0,558.4 602.7,4411.3 2999.6,4392.4 2964.1,1002.6 1065.5,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[743.9,2144.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6731108,41.6191104]}},{"type":"Feature","properties":{"resourceCoords":[743.9,-40.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6732114,41.6201324]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p387 [2]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2953.6"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3706.4"},{"label":"split_canvas_h","value":"4392.4"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6660.0,2728.8 6660.0,2015.6 6660.0,0.0 2953.6,0.0 2999.6,4392.4 6328.8,4364.4 6660.0,4363.2 6660.0,2728.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3773.2,2612.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6914477,41.6221693]}},{"type":"Feature","properties":{"resourceCoords":[5964.3,2612.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6900698,41.6221725]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p387 [3]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4363.2"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"3676.8"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6219.2,8040.0 6660.0,8040.0 6660.0,6146.0 6660.0,5504.0 6660.0,5264.0 6660.0,4363.2 6328.8,4364.4 2999.6,4392.4 0.0,4416.0 -0.0,8040.0 6219.2,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0387__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4640.0,5450.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.687753,41.629453]}},{"type":"Feature","properties":{"resourceCoords":[664.0,5450.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.690163,41.629441]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p388 [1]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6660.0"},{"label":"split_canvas_h","value":"4636.8"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6660.0,0.0 0.0,-0.0 0.0,1963.2 -0.0,4636.8 298.8,4636.8 2675.6,4632.0 2739.6,4632.0 6660.0,4624.8 6660.0,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3684.0,2700.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6960529,41.6221568]}},{"type":"Feature","properties":{"resourceCoords":[900.0,2700.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6977306,41.6221525]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p388 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"2"},{"label":"split_canvas_x","value":"2739.6"},{"label":"split_canvas_y","value":"4624.8"},{"label":"split_canvas_w","value":"3920.4"},{"label":"split_canvas_h","value":"3415.2"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6660.0,8040.0 6660.0,4624.8 2739.6,4632.0 2755.6,8040.0 6660.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0388__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3283.1,6968.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6977663,41.6149053]}},{"type":"Feature","properties":{"resourceCoords":[6104.5,6968.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.696034,41.6148788]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p389 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"4"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"5044.4"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"2995.6"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8040.0 6168.4,8040.0 6600.0,8040.0 6600.0,5072.8 6252.0,5072.0 0.0,5044.4 -0.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3316.0,6520.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.696242,41.6294106]}},{"type":"Feature","properties":{"resourceCoords":[5284.0,6520.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.694995,41.629417]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p389 [2]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"5072.8"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,4952.0 6600.0,3892.0 6600.0,0.0 -0.0,-0.0 0.0,5044.4 6252.0,5072.0 6600.0,5072.8 6600.0,4952.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0389__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4464.0,1416.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.676734,41.6295]}},{"type":"Feature","properties":{"resourceCoords":[2464.0,1416.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6779978,41.6294966]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p390 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,8040.0 6600.0,8040.0 6600.0,1653.2 5310.7,1642.7 5302.4,538.3 1410.4,537.4 1401.9,5437.7 -0.0,5437.7 -0.0,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[5332.0,4452.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.677856,41.611261]}},{"type":"Feature","properties":{"resourceCoords":[1388.0,7384.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.68152,41.6148862]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p390 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1143.6"},{"label":"split_canvas_h","value":"1558.4"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,-0.0 0.0,1558.4 1011.9,1547.4 1014.2,0.0 0.0,-0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0390__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67556005762921,41.61080603706695]}},{"type":"Feature","properties":{"resourceCoords":[1143.6,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6755759099695,41.611345287408696]}},{"type":"Feature","properties":{"resourceCoords":[1143.6,1558.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67459925691102,41.611361563145145]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1558.4],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67458340457073,41.6108223128034]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0391/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p391","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0391/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0391/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5928.6,7214.0 5926.5,8040.0 -0.0,8040.0 -0.0,0.0 6600.0,-0.0 6600.0,7210.7 5928.6,7214.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0391/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6497648514267,41.6241305948432]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.64971209965715,41.618046498905294]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65955701149147,41.617998121175845]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65960976326102,41.62408221711375]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0392/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p392","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0392/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0392/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"349.1,4843.3 -0.0,3064.3 -0.0,-0.0 6600.0,0.0 6600.0,6077.8 4392.7,7390.3 951.8,7424.4 349.1,4843.3\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0392/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67579984152852,41.6225209623481]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67175545677749,41.622519120711566]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67175843678254,41.618810062826554]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67580282153357,41.61881190446309]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0393/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p393","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0393/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0393/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"242.0,4218.6 636.7,4220.3 614.6,791.6 1477.8,738.7 1431.8,0.0 6660.0,0.0 6660.0,8040.0 6177.7,8040.0 3406.9,8040.0 3215.0,8040.0 3219.7,6822.0 2230.2,6810.0 2228.0,8040.0 225.8,8040.0 242.0,4218.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0393/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67340884288875,41.618787959752126]}},{"type":"Feature","properties":{"resourceCoords":[6660.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66528228601067,41.618859956158346]}},{"type":"Feature","properties":{"resourceCoords":[6660.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66516684594622,41.611473698102564]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6732934028243,41.611401701696344]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0394/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p394","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0394/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0394/info.json","type":"ImageService2","height":8040,"width":6660},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1634.5,6141.1 1165.6,5975.1 1148.1,4654.5 1621.8,5042.9 1590.9,2377.2 1455.0,2259.2 1136.6,2692.8 1127.3,2979.2 -0.0,2877.1 -0.0,1353.8 1108.6,1336.5 1107.8,1242.2 3090.6,1218.2 3078.0,0.0 4058.2,0.0 4068.3,1206.4 6660.0,1175.1 6660.0,8040.0 4445.9,8040.0 4386.5,7815.5 4527.7,7521.1 4525.2,7291.3 4120.9,7245.3 3555.3,6964.3 3568.0,8040.0 -0.0,8040.0 -0.0,7059.0 1644.9,7040.2 1634.5,6141.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0394/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67438152038383,41.61255670912366]}},{"type":"Feature","properties":{"resourceCoords":[6660.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66617721541093,41.612554707074985]}},{"type":"Feature","properties":{"resourceCoords":[6660.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66618042521159,41.6050970569575]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6743847301845,41.60509905900617]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p395 [1]","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"33"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6600.0"},{"label":"split_canvas_h","value":"8040.0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,4584.0 0.0,5340.0 0.0,6016.0 -0.0,6052.7 1304.3,6066.0 1289.8,7473.1 6600.0,7536.2 6600.0,7512.4 6600.0,6555.6 6600.0,4928.0 6600.0,4116.2 6236.5,4136.3 6244.4,2977.3 3695.0,2955.3 3718.7,1654.5 4257.1,1664.3 4258.5,1491.3 3184.8,1487.9 3179.7,2080.6 2325.1,2073.3 2326.4,1964.4 360.4,1933.2 359.2,2056.5 -0.0,2053.4 0.0,4584.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4244.0,2960.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.675575,41.619093]}},{"type":"Feature","properties":{"resourceCoords":[328.0,5480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.680342,41.616707]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p395 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"4906.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"1693.6"},{"label":"split_canvas_h","value":"2743.2"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,2599.1 6600.0,0.0 4930.4,0.0 4907.2,2615.6 6600.0,2599.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0395__2/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[4906.4,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67625109793772,41.62028657048977]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67521921708868,41.62028649567922]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,2743.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.67521937786458,41.61902963256676]}},{"type":"Feature","properties":{"resourceCoords":[4906.4,2743.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.6762512587136,41.6190297073773]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0396/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p396","metadata":[{"label":"streets","value":"13"},{"label":"intersections","value":"18"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0396/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0396/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2215.5,2071.7 2196.9,0.0 2697.2,0.0 2698.4,533.4 5527.5,553.6 5553.8,3241.3 6600.0,3206.6 6566.6,8040.0 4636.4,8040.0 4633.3,6733.0 4268.2,6736.2 4253.1,8040.0 3707.6,8040.0 3715.5,6741.1 1386.0,6761.6 1400.4,2079.1 2215.5,2071.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0396/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4632.0,6224.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6621559,41.6076296]}},{"type":"Feature","properties":{"resourceCoords":[3692.0,228.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.663342,41.613187]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0397/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p397","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0397/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0397/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"5998.6,8040.0 6022.0,6838.2 5264.0,6834.4 5267.1,6687.7 4128.2,6663.2 4119.9,8040.0 2030.7,8040.0 2041.4,6618.3 998.0,6595.9 1055.8,3159.2 -0.0,3183.5 -0.0,169.7 65.6,170.4 63.4,491.9 2086.5,526.3 2088.1,0.0 6600.0,0.0 6600.0,8040.0 5998.6,8040.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0397/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66107223405974,41.61334394887459]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65296000276365,41.613421002082816]}},{"type":"Feature","properties":{"resourceCoords":[6600.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.65283534198646,41.605980102442665]}},{"type":"Feature","properties":{"resourceCoords":[0.0,8040.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-93.66094757328256,41.60590304923444]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0398/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p398","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"20"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0398/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0398/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6600.0,2105.0 6600.0,5988.8 6600.0,8040.0 2441.8,8040.0 138.6,8040.0 -0.0,8040.0 -0.0,5068.7 -0.0,1941.6 350.0,1114.5 1011.6,-0.0 2699.8,-0.0 6051.7,-0.0 6600.0,1044.9 6600.0,2105.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0398/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4348.0,3100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.661012,41.614958]}},{"type":"Feature","properties":{"resourceCoords":[2412.0,5032.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.663375,41.616744]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0399/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Des Moines, Iowa | 1957 | sanborn02629_015 p399","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"12"}],"created":"2026-09-22T03:55:38Z","modified":"2026-09-22T03:55:38Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0399/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0399/info.json","type":"ImageService2","height":8040,"width":6600},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2500.3,471.0 2211.7,458.3 1778.3,134.6 1898.8,-0.0 4586.4,-0.0 4189.4,469.6 5520.9,467.4 5693.5,-0.0 6600.0,-0.0 6600.0,8040.0 2122.7,8013.7 2144.3,1595.4 2384.4,1598.2 2500.3,471.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd415m:g4154m:g4154dm:g02629195703:02629_03_1957-0399/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4804.0,4404.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.677802,41.607633]}},{"type":"Feature","properties":{"resourceCoords":[844.0,6368.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.6802733,41.6112561]}}]}}]}