{"id":"https://data.mapsnap.org/runs/v1.3/iiif/loc/sanborn00621_001.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"La Mesa, California | 1911 | mapsnap generated fit (2026-09-23)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-09-23"},{"label":"run","value":"corpus-v1"},{"label":"pages","value":"5"},{"label":"placed","value":"4"},{"label":"unplaced","value":"1"},{"label":"fit sources","value":"georef 3, georef-snap 1"},{"label":"key map","value":"none"},{"label":"unplaced pages","value":"p2 (tier 1, 32.76351,-117.01890 +/-258m)"}],"items":[{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0001/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Mesa, California | 1911 | sanborn00621_001 p1","metadata":[{"label":"streets","value":"3"},{"label":"intersections","value":"3"}],"created":"2026-09-23T10:15:36Z","modified":"2026-09-23T10:15:36Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0001/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0001/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 0.0,0.0 3045.6,-0.0 2663.4,174.4 2754.9,375.0 6245.5,381.9 6182.1,6570.1 6217.8,6994.6 6452.0,6887.7 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0001/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[1204.0,3408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.019218,32.768326]}},{"type":"Feature","properties":{"resourceCoords":[6212.0,3408.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.019188,32.766048]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0003/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Mesa, California | 1911 | sanborn00621_001 p3","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"12"}],"created":"2026-09-23T10:15:36Z","modified":"2026-09-23T10:15:36Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0003/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0003/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6197.9,7652.0 399.9,7652.0 3160.8,1670.0 -0.0,224.4 0.0,-0.0 6079.7,-0.0 6197.9,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0003/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[6124.0,2872.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.0174543,32.7645901]}},{"type":"Feature","properties":{"resourceCoords":[1880.0,4400.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.019188,32.766048]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0004/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Mesa, California | 1911 | sanborn00621_001 p4","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"5"}],"created":"2026-09-23T10:15:36Z","modified":"2026-09-23T10:15:36Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0004/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0004/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"-0.0,7652.0 0.0,0.0 5921.0,0.0 5916.9,243.3 6368.0,244.0 6452.0,7652.0 -0.0,7652.0\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0004/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[200.0,244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.0225754,32.7624846]}},{"type":"Feature","properties":{"resourceCoords":[6368.0,244.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-117.0195704,32.7637216]}}]}},{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0005/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"La Mesa, California | 1911 | sanborn00621_001 p5","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"}],"created":"2026-09-23T10:15:36Z","modified":"2026-09-23T10:15:36Z","motivation":"georeferencing","target":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0005/selector","type":"SpecificResource","source":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0005/info.json","type":"ImageService2","height":7652,"width":6452},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"6452.0,7426.8 212.6,7474.7 194.0,256.5 -0.0,255.4 -0.0,-0.0 6452.0,-0.0 6452.0,7426.8\" /></svg>"}},"body":{"id":"https://tile.loc.gov/image-services/iiif/service:gmd:gmd436m:g4364m:g4364lm:g4364lm_g006211911:00621_1911-0005/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-117.01597105971322,32.76529734604162]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-117.014454508897,32.762629764635946]}},{"type":"Feature","properties":{"resourceCoords":[6452.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-117.01819038840672,32.761106613519736]}},{"type":"Feature","properties":{"resourceCoords":[0.0,7652.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-117.01970693922294,32.76377419492541]}}]}}]}