{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn09252_007.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Mount Vernon, Washington | 1921 | mapsnap generated fit (2026-09-24)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-24"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"29"},{"label":"placed","value":"19"},{"label":"unplaced","value":"10"},{"label":"fit sources","value":"georef 12, georef-snap 7"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"9 sheet(s) cut into 22 panels"},{"label":"unplaced pages","value":"p10__1 (tier 2, 48.41688,-122.33418 +/-190m); p10__2 (tier 1, 48.41586,-122.33561 +/-100m); p13__2 (tier 2, 48.41433,-122.34028 +/-171m); p14__2 (tier 1, 48.41518,-122.33504 +/-100m); p15__2 (tier 1, 48.41176,-122.33675 +/-147m); p15__3 (tier 1, 48.41267,-122.34186 +/-102m); p16__2 (tier 1, 48.42115,-122.34667 +/-100m); p1__2 (tier 1, 48.41389,-122.33262 +/-100m); p4__2 (tier 1, 48.42099,-122.33785 +/-100m); p6__2 (tier 3, 48.41983,-122.33753 +/-524m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0011/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p11","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0011/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0011/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7652.0 840.4,7652.0 855.0,6903.8 -0.0,6887.3 -0.0,-0.0 6452.0,60.6 6452.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0011/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33255669741551,48.41838625004454]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.32807717655574,48.418402341333056]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.32804862433225,48.4148513987009]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33252814519203,48.41483530741238]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p12 [1]","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"3753.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2142.6,0.0 2144.8,571.4 184.5,579.1 308.7,7652.0 3750.4,7652.0 3753.6,0.0 2142.6,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2597.1,4032.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3264242,48.4165507]}},{"type":"Feature","properties":{"resourceCoords":[2597.1,2060.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3264074,48.4174627]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p12 [2]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"3750.4"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"2701.6"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__2/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7652.0 6452.0,7535.7 5841.8,7536.2 5850.3,4615.5 6258.7,4615.2 6276.2,8.5 3753.6,0.0 3750.4,7652.0 6452.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0012__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6272.2,1612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3447038,48.423096]}},{"type":"Feature","properties":{"resourceCoords":[4034.1,7540.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3463033,48.4203278]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0013__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p13 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0013__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0013/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"276.0,236.0 248.0,1661.2 604.3,1790.1 602.6,2429.2 -0.0,2427.6 0.0,2814.0 -0.0,7652.0 4708.0,7652.0 5872.0,7652.0 6452.0,7652.0 6452.0,6840.7 6091.3,6838.5 6111.7,3476.2 6312.0,3480.0 6331.7,228.8 276.0,236.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0013__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6312.0,3480.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3412646,48.4129393]}},{"type":"Feature","properties":{"resourceCoords":[276.0,236.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3389323,48.4157477]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0014__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p14 [1]","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0014__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0014/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,2840.8 5285.2,2844.4 5282.8,0.0 4144.6,-0.0 4134.2,869.4 1215.6,852.2 1220.6,-0.0 -0.0,0.0 -0.0,3176.2 160.7,3149.3 91.6,7412.3 6452.0,7423.2 6452.0,2840.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0014__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2104.0,7420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.338949,48.414825]}},{"type":"Feature","properties":{"resourceCoords":[6272.0,7420.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3389726,48.4129139]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p15 [1]","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"4428.4"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,360.1 6334.4,361.1 6336.0,192.0 3220.2,176.9 3222.5,0.0 -0.0,-0.0 -0.0,4428.4 2204.4,4423.2 4325.2,4417.2 4329.2,2383.6 6452.0,2380.0 6452.0,360.1\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3220.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3412646,48.4129393]}},{"type":"Feature","properties":{"resourceCoords":[6336.0,192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3389726,48.4129139]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p15 [4]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"split_canvas_x","value":"2204.4"},{"label":"split_canvas_y","value":"4417.2"},{"label":"split_canvas_w","value":"2120.8"},{"label":"split_canvas_h","value":"3234.8"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__4/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2204.4,7652.0 3568.0,7652.0 4319.2,7652.0 4325.2,4417.2 2204.4,4423.2 2204.4,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0015__4/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[2204.4,4417.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.34208679521865,48.410693377679564]}},{"type":"Feature","properties":{"resourceCoords":[4325.2,4417.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.34061502511543,48.41069472746636]}},{"type":"Feature","properties":{"resourceCoords":[4325.2,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3406119428919,48.40919301659781]}},{"type":"Feature","properties":{"resourceCoords":[2204.4,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.34208371299512,48.40919166681102]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0016__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p16 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"11"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0016__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0016/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7652.0 6452.0,1702.8 5139.6,1703.6 5139.6,0.0 419.6,0.0 415.4,4682.1 -0.0,4683.6 -0.0,7652.0 6452.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0016__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[2200.0,4664.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3434858,48.4216929]}},{"type":"Feature","properties":{"resourceCoords":[3812.0,4664.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3423677,48.4216871]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0001__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p1 [1]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"5"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4474.8"},{"label":"split_canvas_w","value":"3532.4"},{"label":"split_canvas_h","value":"3177.2"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0001__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7355.9 264.0,7356.3 859.0,7361.1 860.8,7652.0 3529.6,7652.0 3532.4,4512.0 0.0,4474.8 -0.0,7355.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0001__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[264.0,7356.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3342506,48.4138676]}},{"type":"Feature","properties":{"resourceCoords":[3436.4,7356.3],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3320328,48.4138469]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0002/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p2","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0002/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0002/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6348.9,1850.0 6397.9,7441.9 3125.7,7370.3 3117.6,6841.2 -0.0,6872.6 0.0,-0.0 6452.0,0.0 6106.2,140.8 6094.8,1850.6 6348.9,1850.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0002/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3374615715062,48.42763887273708]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33298019532106,48.42765792713491]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3329463792782,48.42410615536996]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33742775546334,48.42408710097213]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p3","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0003/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"344.7,7386.7 257.2,1728.1 -0.0,1730.4 -0.0,-0.0 6452.0,0.0 6452.0,7652.0 5157.3,7652.0 5076.8,7416.7 344.7,7386.7\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0003/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33321973069728,48.42759157291107]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.32879145649689,48.42759053415476]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.32879329998856,48.42408084864263]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33322157418895,48.42408188739894]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0004__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p4 [1]","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"7"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"6452.0"},{"label":"split_canvas_h","value":"7652.0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0004__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0004/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"888.8,0.0 902.4,2268.0 0.0,2280.0 -0.0,7652.0 395.3,7652.0 637.3,7006.6 2547.8,6996.2 2301.9,7652.0 4352.0,7652.0 5120.0,7652.0 5355.0,7652.0 6311.0,5227.0 6308.8,584.2 4688.0,536.0 4685.4,0.0 888.8,0.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0004__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4688.0,2752.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3352327,48.4232119]}},{"type":"Feature","properties":{"resourceCoords":[4688.0,536.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.335258,48.4242271]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0005/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"142.0,7045.9 -0.0,487.9 6358.0,530.2 6438.3,702.7 6452.0,5970.0 5011.3,5962.4 5027.6,7159.9 142.0,7045.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33413760645803,48.42444300453059]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3296709525862,48.42443418120848]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.32968661046034,48.420893858578644]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33415326433217,48.42090268190075]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p6 [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":"3168.8"},{"label":"split_canvas_h","value":"4047.2"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__1/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"2913.1,3792.8 3100.2,3792.5 3150.6,1006.1 1336.3,1697.3 1336.3,2404.5 956.4,2546.9 0.0,-0.0 0.0,4026.4 2911.2,4046.0 2913.1,3792.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1336.3,3795.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3384541,48.4203495]}},{"type":"Feature","properties":{"resourceCoords":[1336.3,1695.7],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3379804,48.4212321]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__3/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p6 [3]","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"4026.4"},{"label":"split_canvas_w","value":"3095.6"},{"label":"split_canvas_h","value":"3625.6"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__3/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"3036.3,7347.6 3091.3,4279.3 2844.5,4277.3 2842.6,4530.8 -0.0,4531.0 -0.0,7652.0 1294.4,7652.0 1259.0,7381.4 3036.3,7347.6\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__3/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1287.8,7344.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3391546,48.4190446]}},{"type":"Feature","properties":{"resourceCoords":[1287.8,4282.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3384541,48.4203495]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__4/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p6 [4]","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"3"},{"label":"split_canvas_x","value":"3030.8"},{"label":"split_canvas_y","value":"4047.2"},{"label":"split_canvas_w","value":"3421.2"},{"label":"split_canvas_h","value":"3604.8"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__4/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6399.6,7389.2 6421.7,4070.0 6212.4,4070.0 3506.7,4050.2 3496.4,7358.2 6399.6,7389.2\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0006__4/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[4801.4,5925.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3368305,48.419184]}},{"type":"Feature","properties":{"resourceCoords":[4801.4,7388.2],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3371627,48.4185598]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0007/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p7","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0007/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0007/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6450.8,2943.9 6452.0,6235.4 4850.8,6850.4 5158.6,7652.0 57.2,7652.0 -0.0,200.6 727.9,2003.7 4697.8,634.0 5559.9,2974.1 6450.8,2943.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0007/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3340345216868,48.422177941158715]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.3298192045916,48.421113271383184]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33170846873544,48.417771985021005]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33592378583064,48.418836654796536]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0008/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p8","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"20"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0008/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0008/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"4414.5,7186.9 1984.4,7209.4 2006.1,5951.2 351.6,5363.6 857.4,4039.7 -0.0,3754.5 -0.0,1210.7 652.8,1210.5 629.9,0.0 6452.0,0.0 6452.0,7652.0 4471.7,7652.0 4465.3,7186.6 4414.5,7186.9\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0008/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[3568.0,1220.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3286616,48.4211081]}},{"type":"Feature","properties":{"resourceCoords":[3584.0,7192.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-122.3286847,48.4183751]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0009/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Mount Vernon, Washington | 1921 | sanborn09252_007 p9","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-24T00:01:59Z","modified":"2026-09-24T00:01:59Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0009/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0009/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 -0.0,0.0 547.5,0.0 1723.3,490.7 1776.3,229.5 6191.6,1713.5 6452.0,830.0 6452.0,7362.1 780.3,7291.7 650.1,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd428m:g4284m:g4284mm:g4284mm_g092521921:09252_1921-0009/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.34041055548742,48.41915032286831]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33593905911155,48.41911063127776]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.33600948845975,48.41556609911172]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-122.34048098483562,48.41560579070227]}}]}}]}