{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn08703_011.keymap.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Port Arthur, Texas | 1956 | key map | mapsnap generated fit (2026-10-18)","creator":{"type":"Software","name":"mapsnap","homepage":"https://mapsnap.org"},"rights":"https://opendatacommons.org/licenses/odbl/1-0/","metadata":[{"label":"generated","value":"2026-10-18"},{"label":"run","value":"corpus-v2"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g08703195602:08703_02_1956-0000/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Port Arthur, Texas | 1956 | sanborn08703_011 p0","metadata":[{"label":"streets","value":"58"},{"label":"intersections","value":"32"}],"created":"2026-10-18T21:11:17Z","modified":"2026-10-18T21:11:17Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g08703195602:08703_02_1956-0000/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g08703195602:08703_02_1956-0000","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"0.0,1350.0 0.0,0.0 1088.0,0.0 1088.0,1350.0 0.0,1350.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd403m:g4034m:g4034pm:g4034pm_g08703195602:08703_02_1956-0000/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[470.5,353.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.901662,29.953372]}},{"type":"Feature","properties":{"resourceCoords":[470.5,884.5],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-93.9287526,29.9243713]}}]}}]}