{"id":"https://data.mapsnap.org/runs/v2.0/iiif/chronoscope/sanborn03573_045.main.iiif.json","type":"AnnotationPage","@context":["http://www.w3.org/ns/anno.jsonld"],"label":"Baltimore, Maryland | 1953 | 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"},{"label":"pages","value":"69"},{"label":"placed","value":"58"},{"label":"unplaced","value":"11"},{"label":"fit sources","value":"georef-snap 33, georef 23, snap:0 1, georef-street 1"},{"label":"key map","value":"georeferenced"},{"label":"split sheets","value":"5 sheet(s) cut into 11 panels"},{"label":"unplaced pages","value":"p812__2 (tier 1, 39.31061,-76.64351 +/-106m); p816__2 (tier 2, 39.31100,-76.67924 +/-163m); p838__2 (tier 2, 39.31277,-76.65870 +/-2232m); p847 (tier 1, 39.29520,-76.68783 +/-274m); p848 (tier 1, 39.30113,-76.68406 +/-216m); p866 (tier 2, 39.29665,-76.70649 +/-100m); p869 (tier 2, 39.29576,-76.69589 +/-117m); p890__1 (tier 1, 39.31636,-76.70362 +/-272m); p890__2 (tier 1, 39.31718,-76.70468 +/-100m); p890__3 (tier 1, 39.31637,-76.70570 +/-126m); p891 (tier 1, 39.29722,-76.66449 +/-239m)"}],"items":[{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0801/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p801","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0801/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0801","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1005.5,1285.8 803.9,1322.4 152.2,1323.9 147.3,410.5 105.4,360.1 197.3,358.7 270.8,36.6 388.6,35.1 664.8,31.6 927.1,28.4 926.9,351.6 933.0,351.5 957.8,681.8 948.4,681.9 933.6,967.8 915.6,968.0 962.8,1200.8 1053.8,1295.7 1005.5,1285.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0801/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[652.0,1051.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.664942352999,39.29522364374754]}},{"type":"Feature","properties":{"resourceCoords":[652.0,48.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66507362872714,39.29799494569837]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0802/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p802","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0802/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0802","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"234.9,35.7 914.2,31.7 913.0,679.8 915.4,960.1 915.3,1322.7 519.1,1327.8 337.1,1289.3 247.8,1195.0 202.7,964.5 220.4,964.4 236.9,682.0 246.2,682.0 223.8,355.3 217.8,355.3 220.1,35.8 234.9,35.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0802/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[691.0,963.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66224884182205,39.29554284118563]}},{"type":"Feature","properties":{"resourceCoords":[916.0,43.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66157973163381,39.29814092435657]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0803/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p803","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0803/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0803","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"235.7,1333.5 235.0,970.0 232.0,689.0 231.8,39.3 571.9,36.0 751.4,16.5 825.2,12.9 952.6,11.9 950.2,838.5 953.5,852.7 950.0,1037.2 949.5,1058.4 943.0,1058.5 957.2,1322.6 235.7,1333.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0803/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[232.0,361.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6615396,39.2972755]}},{"type":"Feature","properties":{"resourceCoords":[232.0,689.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6614912,39.2963611]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0804/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p804","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0804/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0804","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"173.6,1053.0 180.0,1053.0 180.0,1052.6 180.4,1032.0 184.0,849.4 180.8,835.3 183.5,17.1 195.9,17.0 894.4,13.3 886.2,54.7 918.8,1004.5 872.9,1304.3 187.5,1314.5 173.6,1053.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0804/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[441.0,1055.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65790174815841,39.295437835942025]}},{"type":"Feature","properties":{"resourceCoords":[875.0,281.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65643875870151,39.29766817366825]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0805/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p805","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0805/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0805","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"467.9,1280.4 249.5,1285.2 110.8,1288.3 126.7,1221.8 172.4,1119.8 223.2,981.1 227.7,925.8 223.8,889.2 209.4,853.1 153.6,73.8 155.6,73.7 701.5,61.7 947.7,57.0 988.9,56.2 1011.9,447.6 1005.1,447.6 1010.1,843.5 1011.9,843.5 1007.9,1055.6 1025.2,1055.5 1027.5,1268.0 747.1,1274.2 467.9,1280.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0805/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[721.0,852.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66516265605412,39.299193707830725]}},{"type":"Feature","properties":{"resourceCoords":[721.0,73.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6652369314796,39.3013232757671]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0806/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p806","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0806/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0806","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"174.6,1274.8 177.1,1063.8 159.9,1063.7 168.6,853.2 166.8,853.2 170.8,460.2 177.4,460.2 163.5,71.3 356.1,72.0 869.8,73.7 867.0,1250.5 864.3,1275.2 174.6,1274.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0806/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[503.0,1275.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6628726,39.2981235]}},{"type":"Feature","properties":{"resourceCoords":[373.0,72.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.663547,39.3014157]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0807/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p807","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"20"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0807/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0807","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"164.3,1273.3 159.8,1010.6 196.9,1002.9 219.4,494.5 217.1,494.5 210.2,106.5 403.0,103.5 677.4,99.5 853.9,96.9 954.2,95.4 972.5,481.6 994.7,481.0 944.3,873.5 960.6,873.2 963.0,1260.0 721.2,1263.5 185.0,1273.0 164.3,1273.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0807/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[484.0,491.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6662474,39.3034821]}},{"type":"Feature","properties":{"resourceCoords":[963.0,1260.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6644375,39.3013838]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0808/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p808","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0808/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0808","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"167.7,876.2 151.4,876.2 207.1,483.9 184.8,484.2 171.6,97.4 413.0,97.0 412.9,84.9 923.1,78.6 866.7,874.5 903.6,874.4 905.0,1262.2 396.3,1263.0 165.0,1263.4 167.7,876.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0808/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[413.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6637342,39.3046555]}},{"type":"Feature","properties":{"resourceCoords":[413.0,1263.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.663547,39.3014157]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0809/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p809","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"19"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0809/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0809","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"308.0,99.0 308.0,100.0 312.1,100.0 493.4,99.6 505.6,99.5 731.5,99.0 977.5,98.3 978.6,293.4 979.8,293.4 965.4,548.6 946.7,552.3 947.4,684.3 956.8,684.2 978.0,1069.2 984.8,1087.1 986.5,1105.2 983.8,1132.5 957.6,1200.5 934.2,1250.4 925.9,1283.1 925.6,1284.6 815.7,1294.6 815.8,1292.5 696.1,1284.7 656.0,1271.3 655.0,1239.6 566.1,1209.0 526.8,1161.0 356.9,1146.3 271.6,1091.4 258.4,554.9 290.4,322.4 269.4,243.5 202.4,216.2 177.6,67.8 308.0,99.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0809/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[308.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6720655,39.304358]}},{"type":"Feature","properties":{"resourceCoords":[732.0,437.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6689268,39.3025941]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0810/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p810","metadata":[{"label":"streets","value":"6"},{"label":"intersections","value":"8"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0810/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0810","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"741.1,1287.3 398.8,1290.9 316.1,1254.2 314.4,689.3 313.0,498.0 314.1,112.8 802.4,114.3 805.0,498.0 803.9,901.9 804.4,1137.8 806.4,1318.6 741.1,1287.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0810/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[313.0,498.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6500354,39.3118698]}},{"type":"Feature","properties":{"resourceCoords":[805.0,498.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6482802,39.3119329]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0811/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p811","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0811/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0811","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"741.8,1140.7 583.1,1161.6 445.0,1150.2 354.6,1106.5 353.1,929.7 353.1,699.0 355.0,304.0 573.3,304.0 845.2,302.2 845.5,665.4 843.1,1075.5 741.8,1140.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0811/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[355.0,1061.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6481462,39.3097966]}},{"type":"Feature","properties":{"resourceCoords":[355.0,304.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6482802,39.3119329]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0812__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p812 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0812__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0812","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"175.1,469.5 165.1,840.8 151.1,1260.0 153.5,1258.5 694.4,1294.8 772.2,1237.1 881.7,807.4 843.9,757.0 619.4,472.4 610.3,472.3 601.9,472.2 597.4,472.2 597.5,445.2 499.3,315.5 270.2,32.5 252.9,65.8 200.0,124.8 181.8,145.3 176.1,360.3 175.1,469.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0812__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[740.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64427088032423,39.30998744256387]}},{"type":"Feature","properties":{"resourceCoords":[1227.0,1245.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64253721019014,39.310089631242164]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0813/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p813","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0813/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0813","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"207.8,1328.6 204.8,936.6 163.8,936.7 158.0,567.1 154.7,453.1 149.7,410.4 131.8,359.0 96.3,304.2 69.0,273.1 136.8,236.4 226.2,180.8 289.9,131.8 249.4,79.9 234.3,45.8 307.9,43.5 343.1,84.4 375.1,55.9 566.4,216.7 560.1,222.3 729.6,396.9 728.2,398.2 1024.8,768.5 1022.3,770.7 923.0,856.5 1020.3,973.0 1049.0,1029.8 1061.3,1100.0 1065.1,1320.7 566.2,1325.4 293.3,1328.7 207.8,1328.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0813/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[468.0,326.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65055713377893,39.315625549211596]}},{"type":"Feature","properties":{"resourceCoords":[187.0,1305.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65142295664097,39.31295343447806]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0814/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p814","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.89"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0814/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0814","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"851.0,913.7 847.7,1131.3 848.0,1241.8 566.5,1239.0 340.8,1235.5 345.1,847.2 348.0,628.7 338.0,558.8 311.2,501.6 218.5,383.4 319.4,301.4 409.5,228.0 438.0,204.8 585.2,385.2 613.1,393.2 636.1,421.9 719.6,525.4 815.1,643.9 819.9,667.8 939.0,798.6 922.0,832.5 869.1,892.8 851.0,913.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0814/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[338.0,1233.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64829039593813,39.311939119985134]}},{"type":"Feature","properties":{"resourceCoords":[818.0,684.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64672460225462,39.313519614109865]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0815/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p815","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0815/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0815","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"1017.2,1349.0 940.7,1261.1 273.0,1241.5 229.5,1201.3 210.3,975.1 152.1,914.5 158.7,456.8 340.5,282.1 336.7,184.5 498.9,132.8 642.2,137.8 682.0,174.7 651.6,200.3 720.2,257.0 813.1,222.0 967.3,236.9 1025.7,283.1 1022.6,609.4 1024.2,905.7 1020.3,1293.9 1017.2,1349.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0815/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[661.0,1222.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65147515396376,39.31751605716375]}},{"type":"Feature","properties":{"resourceCoords":[579.0,612.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65009012380115,39.318813112479866]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0816__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p816 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.69"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0816__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0816","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"814.4,71.5 802.9,70.9 703.5,37.9 591.5,53.6 488.3,42.7 370.4,72.9 280.3,136.8 161.1,147.2 87.6,264.0 65.2,267.6 66.3,289.9 161.8,389.4 318.6,455.3 364.1,692.7 356.6,778.7 308.4,842.6 267.3,869.9 168.2,874.0 149.7,895.1 117.2,945.1 108.5,1050.9 88.4,1099.1 55.7,1109.6 53.0,1156.3 388.2,1168.5 591.8,1237.1 756.3,1254.1 837.6,1300.8 863.4,1282.5 893.1,1195.3 939.5,993.0 979.8,995.8 997.6,660.2 908.6,659.4 890.7,659.2 845.8,317.5 836.9,313.4 834.0,299.3 814.4,71.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0816__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[436.0,185.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68273683255222,39.313242301536064]}},{"type":"Feature","properties":{"resourceCoords":[356.0,513.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68316674165857,39.311426042398026]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0817/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p817","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0817/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0817","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"580.2,80.7 244.8,205.2 200.3,860.5 174.3,981.8 95.7,982.5 91.3,1065.7 172.2,1114.2 182.7,1193.2 352.9,1221.9 357.3,1249.3 619.2,1314.6 619.2,1316.6 992.4,1319.2 1017.0,1319.4 1016.0,1071.2 1019.2,819.5 1019.8,592.5 1024.7,24.8 630.8,22.0 630.7,1.0 581.5,1.0 580.2,80.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0817/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[999.0,593.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67085223866223,39.30640235511844]}},{"type":"Feature","properties":{"resourceCoords":[625.0,1300.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67204794545704,39.304404462977324]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0818/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p818","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0818/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0818","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"513.2,28.4 686.5,28.3 802.9,28.1 802.1,127.6 803.2,1067.3 804.1,1315.2 352.1,1315.7 349.0,1069.0 350.2,818.6 349.0,593.0 349.2,28.6 513.2,28.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0818/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[349.0,593.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6707783,39.3064068]}},{"type":"Feature","properties":{"resourceCoords":[349.0,1069.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6707021,39.3050901]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0819/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p819","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0819/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0819","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"709.6,23.4 956.5,21.8 958.8,360.8 960.8,360.8 962.5,818.7 985.0,1069.2 987.1,1069.2 1013.9,1320.4 913.5,1321.2 717.7,1322.6 220.7,1326.2 218.3,1076.0 211.7,127.3 212.0,26.8 709.6,23.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0819/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[802.0,1071.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66701206359612,39.3052269765196]}},{"type":"Feature","properties":{"resourceCoords":[713.0,372.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6674238791054,39.30713312060336]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0820/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p820","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"14"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0820/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0820","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"295.3,33.2 431.7,30.8 834.6,93.9 920.6,362.3 918.3,362.4 916.9,362.4 927.2,815.9 933.7,815.8 933.0,1065.0 936.0,1289.8 936.4,1312.4 593.6,1315.4 416.4,1316.9 240.1,1318.4 213.3,1070.0 211.3,1070.0 188.6,822.3 186.4,369.4 184.4,369.4 181.6,34.2 295.3,33.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0820/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[437.0,367.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6656504,39.3072233]}},{"type":"Feature","properties":{"resourceCoords":[933.0,1065.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6637798,39.3053407]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0821/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p821","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"12"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0821/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0821","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"344.6,378.3 262.1,107.5 464.4,142.2 454.9,75.4 848.3,65.8 848.3,69.3 844.4,836.5 898.3,836.9 860.7,1317.6 346.9,1320.2 346.8,1309.8 347.0,1084.0 351.3,833.8 344.7,833.8 340.9,378.3 342.3,378.3 344.6,378.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0821/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[347.0,1084.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6637798,39.3053407]}},{"type":"Feature","properties":{"resourceCoords":[498.0,379.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6633721,39.3073067]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0822/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p822","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.94"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0822/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0822","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"366.2,1324.8 293.6,1306.5 264.0,1108.9 319.6,778.1 272.5,736.6 252.8,539.4 301.6,46.4 280.8,39.4 521.5,56.3 521.3,60.6 742.7,41.7 743.2,38.8 881.0,38.8 979.7,38.8 901.9,361.2 809.6,361.5 851.0,412.6 844.5,1329.7 366.2,1324.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0822/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[444.0,589.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6682438564792,39.29640213430469]}},{"type":"Feature","properties":{"resourceCoords":[218.0,1315.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66892018940739,39.2943748245007]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0823/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p823","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0823/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0823","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"322.4,836.3 268.1,836.0 271.6,63.0 271.8,36.4 606.5,37.9 606.4,54.6 873.2,63.8 975.8,839.6 929.5,839.3 872.1,1239.5 1087.0,1256.5 1087.0,1285.6 283.7,1334.7 322.4,836.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0823/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[605.0,837.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.660860669347,39.30613916386472]}},{"type":"Feature","properties":{"resourceCoords":[605.0,51.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66100364600656,39.30829073071941]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0824/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p824","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"3"},{"label":"confidence","value":"0.13"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0824/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0824","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"192.7,1212.7 245.7,827.4 290.2,827.4 187.4,82.6 987.0,56.1 1087.0,56.0 1087.0,74.3 1044.1,74.8 995.2,726.8 1037.6,733.5 1036.6,1065.2 993.8,1068.0 951.2,1170.3 946.7,1268.3 192.7,1212.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0824/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[987.0,56.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6571157,39.3084704]}},{"type":"Feature","properties":{"resourceCoords":[987.0,827.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6569858,39.3062763]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0825/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p825","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0825/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0825","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"954.0,1189.2 595.8,1182.6 212.2,1187.2 216.4,728.5 216.0,686.7 203.5,664.5 199.1,625.2 209.2,471.5 203.1,224.2 108.3,212.3 62.1,198.2 203.0,192.9 408.8,192.8 589.5,188.9 889.5,185.4 990.4,185.8 990.0,323.6 971.1,481.5 995.0,1089.0 980.1,1168.8 954.0,1189.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0825/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[591.0,688.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67416957197439,39.30993460534611]}},{"type":"Feature","properties":{"resourceCoords":[207.0,1181.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67598322824247,39.31093766500199]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0826/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p826","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0826/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0826","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"100.0,894.5 148.2,884.5 150.0,782.5 150.7,478.7 149.4,295.6 152.2,87.2 173.3,88.7 1011.7,96.7 1004.5,892.0 1002.1,1249.3 884.0,1248.2 707.9,1246.5 541.4,1245.0 143.6,1241.2 143.6,1219.1 94.0,1219.0 100.0,894.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0826/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[537.0,883.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67095338803584,39.30895270950824]}},{"type":"Feature","properties":{"resourceCoords":[537.0,485.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67103063150566,39.31003605163451]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0827/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p827","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0827/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0827","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"735.0,100.0 947.0,99.1 1010.7,480.4 993.2,480.3 1000.6,671.6 998.7,671.6 991.5,878.7 989.1,878.7 983.2,1230.9 735.0,1231.0 244.0,1231.2 242.8,880.8 242.3,100.7 735.0,100.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0827/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[735.0,1231.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.667484,39.308088]}},{"type":"Feature","properties":{"resourceCoords":[735.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.667668,39.3112284]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0828/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p828","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"5"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0828/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0828","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"970.1,1326.8 369.0,1225.7 233.2,1226.6 124.6,1226.2 131.8,874.8 134.2,874.8 142.1,668.2 144.0,668.2 137.2,477.2 154.8,477.4 92.5,96.6 348.4,96.4 863.0,97.0 862.2,485.1 863.0,669.0 861.3,826.7 897.8,888.0 910.4,921.2 959.4,1252.5 970.1,1326.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0828/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[369.0,1227.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6657145,39.3081507]}},{"type":"Feature","properties":{"resourceCoords":[863.0,97.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6641371,39.3113614]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0829/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p829","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0829/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0829","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"713.4,100.3 1015.9,99.0 1017.6,551.8 1015.9,844.8 1051.7,924.9 1053.8,1248.0 718.5,1250.2 718.6,1273.2 321.7,1287.3 320.5,1279.1 267.8,942.3 254.7,908.6 217.1,846.5 217.6,686.0 215.2,498.8 212.8,103.7 713.4,100.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0829/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[709.0,109.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66238322735866,39.31140220983172]}},{"type":"Feature","properties":{"resourceCoords":[709.0,1238.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66222047239,39.30831582868044]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0830/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p830","metadata":[{"label":"streets","value":"4"},{"label":"intersections","value":"6"},{"label":"confidence","value":"0.71"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0830/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0830","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.9,111.4 993.9,140.7 990.5,870.4 1010.5,870.6 1013.6,900.3 992.7,900.0 990.8,1244.9 438.4,1257.0 438.3,1255.9 175.8,1245.5 176.0,1229.0 179.0,911.6 145.1,832.5 151.5,544.7 156.9,111.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0830/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[176.0,1229.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6610009,39.3083269]}},{"type":"Feature","properties":{"resourceCoords":[157.0,100.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6613003,39.3114639]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0831/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p831","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.84"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0831/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0831","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"220.0,1224.8 218.3,875.8 218.8,875.8 240.1,875.8 236.6,845.8 216.2,845.8 212.8,107.1 496.9,114.5 504.0,87.3 512.3,64.5 926.1,133.7 926.2,144.2 925.4,459.0 926.2,799.1 883.5,1085.4 763.0,1123.8 634.1,1235.3 595.8,1235.8 594.8,1216.8 490.6,1216.6 220.0,1224.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0831/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65905271540099,39.31174960404913]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65521442319505,39.31189338606898]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6549854586755,39.3081824440263]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.65882375088144,39.30803866200645]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0832/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p832","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.93"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0832/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0832","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.8,855.0 147.0,532.7 146.7,486.3 375.1,249.2 374.8,303.4 595.2,234.1 594.6,212.3 999.2,198.8 998.4,333.6 992.5,1230.8 978.8,1205.1 507.8,1276.1 145.1,1197.0 144.8,855.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0832/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[157.0,853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65566825212056,39.3106171714867]}},{"type":"Feature","properties":{"resourceCoords":[983.0,853.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65280240452975,39.31073243587669]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0833/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p833","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.97"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0833/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0833","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"291.6,1279.0 255.5,1276.9 199.3,581.0 181.8,571.8 177.2,542.9 160.9,80.1 346.3,100.2 403.6,36.1 495.1,26.0 795.5,69.9 821.0,159.7 1033.3,1021.3 872.1,933.6 807.9,898.7 646.0,810.8 664.4,865.2 634.2,1299.6 291.6,1279.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0833/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[445.0,108.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.679117,39.31399]}},{"type":"Feature","properties":{"resourceCoords":[191.0,1273.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6795583,39.3107893]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0834/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p834","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.81"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0834/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0834","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"904.2,1243.6 884.3,1217.2 897.1,859.9 899.4,477.1 905.0,272.9 753.3,200.0 551.6,103.0 487.3,72.1 339.5,1.0 328.0,1.0 345.8,46.4 337.4,471.2 178.4,469.6 142.7,1133.2 481.5,1157.0 904.2,1243.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0834/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[901.0,473.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67599941461091,39.31093417462472]}},{"type":"Feature","properties":{"resourceCoords":[901.0,253.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67604563275869,39.311541629189016]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0835/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p835","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0835/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0835","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"551.4,1090.1 401.1,1018.7 361.2,999.8 111.1,180.8 81.8,95.7 208.2,106.1 424.9,26.0 734.1,23.3 958.9,64.3 1033.0,121.5 1047.2,123.0 1047.2,336.2 1043.8,730.9 1040.6,1301.9 999.4,1301.8 546.9,1292.0 551.4,1090.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0835/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[541.0,1289.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67602628882385,39.31092996897808]}},{"type":"Feature","properties":{"resourceCoords":[1025.0,524.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67442713887161,39.313139576925515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0836/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p836","metadata":[{"label":"streets","value":"7"},{"label":"intersections","value":"9"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0836/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0836","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"791.2,1180.1 778.3,1276.8 525.5,1281.0 368.5,1269.4 328.2,1273.6 305.5,1286.2 306.2,694.8 307.9,285.9 307.0,65.1 813.0,117.5 810.6,287.3 810.8,493.3 808.5,1061.9 806.0,1133.0 791.2,1180.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0836/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[306.0,886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6742871,39.3120486]}},{"type":"Feature","properties":{"resourceCoords":[809.0,886.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6725334,39.3121155]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0837/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p837","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0837/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0837","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"176.0,1284.9 154.5,1283.9 147.8,1139.2 149.2,1067.8 142.0,496.4 138.4,289.3 138.1,118.8 169.8,121.5 635.0,26.2 770.6,25.7 868.8,94.2 1011.2,113.2 1026.5,1274.0 176.0,1284.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0837/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[997.0,508.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66962538209661,39.31321908174777]}},{"type":"Feature","properties":{"resourceCoords":[161.0,888.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67248424311316,39.31212485837158]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0838__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p838 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.86"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"5400.0"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0838__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0838","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"179.3,1121.7 122.9,1185.7 93.5,1231.6 93.0,1233.0 293.4,1265.2 293.1,1248.2 400.4,1134.2 400.6,1160.0 505.1,1125.8 504.7,1115.4 697.2,1106.8 697.1,1097.1 888.7,1050.8 888.7,1044.1 899.4,1044.2 907.5,1044.3 907.4,856.6 887.8,856.5 886.1,679.6 884.9,625.0 882.6,604.5 874.3,579.9 857.5,553.5 844.5,538.6 877.1,521.2 920.0,494.8 950.7,471.6 931.5,446.6 924.4,430.2 835.3,432.4 832.2,449.0 563.1,426.1 555.2,268.1 380.6,213.2 232.9,200.0 188.7,229.3 170.3,271.6 258.3,282.3 254.8,368.2 230.6,434.1 206.2,447.5 148.8,458.0 240.8,463.9 237.6,495.1 238.0,590.1 238.1,661.0 238.6,711.5 208.8,1073.0 186.3,1114.0 179.3,1121.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0838__1/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[694.0,1255.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65284336161527,39.31165349292188]}},{"type":"Feature","properties":{"resourceCoords":[890.0,1255.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65141345603737,39.311698342600515]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0839/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p839","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0839/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0839","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"465.4,65.2 770.6,79.7 936.0,160.1 971.8,504.9 974.2,505.0 957.9,688.1 954.0,688.1 948.9,890.1 957.5,890.1 980.8,1279.4 681.6,1280.1 181.3,1279.8 183.0,139.9 465.4,65.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0839/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[682.0,693.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66776503881407,39.31283340488426]}},{"type":"Feature","properties":{"resourceCoords":[183.0,894.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66949450163925,39.312219171756816]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0840/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p840","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0840/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0840","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"334.9,1298.3 158.1,1298.7 134.9,908.7 126.3,908.7 131.5,706.3 135.4,706.3 151.8,522.8 149.4,522.8 113.5,177.2 117.0,178.9 293.8,98.4 468.6,79.1 536.3,79.4 835.4,144.0 852.2,140.6 862.6,176.6 862.2,522.2 859.6,1298.3 334.9,1298.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0840/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[361.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66596021991003,39.31234515845555]}},{"type":"Feature","properties":{"resourceCoords":[860.0,914.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.66420025878763,39.31241016039039]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0841/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p841","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.88"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0841/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0841","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"208.6,469.3 190.1,469.2 220.3,76.4 618.1,51.9 618.6,37.5 899.7,59.6 899.0,75.0 989.5,118.7 1015.5,327.4 1003.9,553.8 971.0,674.1 958.1,1117.6 930.1,1253.5 574.5,1252.0 503.9,1251.9 466.6,1253.3 376.1,1262.2 204.6,1262.2 206.0,1250.0 208.1,664.2 208.6,469.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0841/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[378.0,473.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6606362015272,39.30258369946765]}},{"type":"Feature","properties":{"resourceCoords":[920.0,866.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.65662159314039,39.30056373960233]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0842/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p842","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0842/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0842","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"115.0,808.6 112.8,507.9 115.2,176.6 158.4,210.8 244.2,139.9 762.9,168.5 842.7,126.2 1027.2,142.4 912.6,164.5 914.6,293.0 918.9,1127.6 915.6,1127.6 920.0,1270.5 667.4,1261.5 667.3,1259.6 423.3,1274.2 423.1,1265.8 175.4,1306.0 176.1,1349.0 122.0,1349.0 153.6,1309.9 108.8,1258.6 111.5,1258.5 111.8,1202.6 115.0,808.6\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0842/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[916.0,567.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6472753,39.3162295]}},{"type":"Feature","properties":{"resourceCoords":[755.0,169.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6466365,39.3172747]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0843/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p843","metadata":[{"label":"streets","value":"10"},{"label":"intersections","value":"15"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0843/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0843","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"759.1,1102.8 735.6,1119.5 504.6,1121.4 504.9,1157.8 505.7,1270.0 287.0,1263.1 282.1,1123.3 285.4,1123.3 277.7,306.8 275.2,181.0 387.3,158.9 830.0,195.7 878.9,146.2 917.1,229.3 922.5,229.7 911.2,455.6 915.0,575.0 918.6,575.0 941.1,793.8 938.9,793.8 905.1,1102.5 795.6,1102.9 759.1,1102.8\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0843/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[732.0,794.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6467664,39.3149046]}},{"type":"Feature","properties":{"resourceCoords":[915.0,575.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6457521,39.3149395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0844/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p844","metadata":[{"label":"streets","value":"11"},{"label":"intersections","value":"16"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0844/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0844","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"525.0,1201.3 351.6,1209.5 330.7,1198.2 181.5,1196.3 159.3,1196.0 197.4,891.5 199.6,891.5 180.6,675.0 177.0,675.0 175.0,557.0 189.6,333.9 184.2,333.6 147.7,250.8 188.5,210.8 149.5,167.4 169.2,139.4 419.2,22.3 724.3,30.4 883.5,88.7 867.4,264.7 878.5,449.2 891.0,449.3 884.2,831.8 886.0,1201.0 525.0,1201.3\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0844/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[177.0,675.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6457521,39.3149395]}},{"type":"Feature","properties":{"resourceCoords":[886.0,1201.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.64538,39.3124971]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0845/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p845","metadata":[{"label":"streets","value":"8"},{"label":"intersections","value":"10"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0845/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0845","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"250.8,839.2 255.2,455.4 242.6,455.4 230.4,270.3 245.5,93.5 259.5,98.5 533.9,81.8 807.3,130.4 847.9,208.0 876.2,705.5 852.4,1187.8 874.9,1217.5 812.2,1215.6 451.5,1213.7 437.7,1230.7 416.8,1213.8 254.9,1209.8 250.8,839.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0845/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[425.0,457.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6429869,39.3135748]}},{"type":"Feature","properties":{"resourceCoords":[837.0,843.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6429939,39.3120076]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__1/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p846 [1]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.34"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"2896.8"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2503.2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__1/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"180.7,758.5 141.1,971.5 167.6,1210.0 219.3,1248.5 857.0,1282.2 882.3,1210.3 968.5,1187.3 985.0,1099.8 980.5,833.5 945.3,782.2 398.5,772.2 180.7,758.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__1/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,724.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.69742577227115,39.29308714817502]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,724.2],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6936046973221,39.293313973016176]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.69343724398891,39.291600515855684]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.69725831893795,39.29137369101453]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__2/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p846 [2]","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.79"},{"label":"confidence_provisional","value":"true"},{"label":"confidence_model","value":"corpus-v2"},{"label":"split_canvas_x","value":"0.0"},{"label":"split_canvas_y","value":"0.0"},{"label":"split_canvas_w","value":"4352.0"},{"label":"split_canvas_h","value":"2930.0"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__2/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"78.9,669.2 154.5,671.1 147.8,730.9 364.8,729.2 907.9,700.6 952.4,547.6 944.9,124.6 260.8,130.7 257.6,57.1 218.5,58.8 167.9,653.1 78.9,669.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0846__2/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[198.0,601.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.69660652568625,39.29338619142153]}},{"type":"Feature","properties":{"resourceCoords":[951.0,601.6],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.69393957041481,39.29339746030755]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0849/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p849","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.98"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0849/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0849","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"656.3,1308.1 318.5,1298.6 242.3,1239.5 231.7,731.5 251.2,130.8 292.3,107.4 742.5,114.1 882.2,114.9 874.2,241.5 854.2,388.4 810.5,603.3 803.2,664.1 793.9,1180.5 793.0,1271.3 656.3,1308.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0849/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[524.0,654.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68507823386196,39.29554085783058]}},{"type":"Feature","properties":{"resourceCoords":[250.0,120.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68614577522048,39.29694631415034]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0850/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p850","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0850/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0850","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"114.2,1160.4 121.1,642.5 128.2,581.4 170.9,365.7 190.2,218.2 197.7,91.2 381.3,94.3 928.2,95.1 921.4,850.0 912.8,1276.2 839.0,1304.5 200.1,1310.8 113.7,1251.5 114.2,1160.4\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0850/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[925.0,637.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68128937432535,39.29568608484454]}},{"type":"Feature","properties":{"resourceCoords":[925.0,93.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68138946866044,39.297157277764406]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0851/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p851","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0851/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0851","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"156.4,848.9 164.2,99.8 566.9,104.5 962.8,107.6 962.8,99.7 1018.4,105.9 978.4,548.0 957.3,565.0 950.5,1174.2 950.1,1273.0 885.3,1309.0 573.3,1311.9 207.7,1297.1 164.9,1265.0 147.2,1271.8 156.4,848.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0851/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[949.0,374.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67856196983422,39.29652057394672]}},{"type":"Feature","properties":{"resourceCoords":[161.0,107.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68138780968148,39.29713196479399]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0852/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p852","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0852/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0852","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"144.4,1186.9 135.1,574.6 155.8,556.9 184.1,113.1 336.0,94.7 334.4,123.2 472.7,156.9 496.4,197.3 635.5,201.1 844.0,32.9 933.1,57.8 949.6,223.1 841.7,340.3 1015.6,501.9 951.6,570.7 942.8,851.3 946.2,851.3 953.9,1259.3 913.0,1317.1 146.8,1286.1 144.4,1186.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0852/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[142.0,647.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67846504866681,39.29580520175856]}},{"type":"Feature","properties":{"resourceCoords":[946.0,863.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67562442654682,39.29527908086375]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0853/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p853","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0853/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0853","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"137.6,858.1 134.1,858.1 145.5,574.5 210.9,505.6 36.6,340.6 146.7,223.1 131.4,55.9 180.8,70.2 258.0,22.8 398.2,37.9 802.7,248.7 862.4,401.7 946.0,455.0 951.2,998.0 910.0,1303.0 346.4,1317.7 141.6,1270.6 137.6,858.1\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0853/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[959.0,861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67277545776454,39.295383685322804]}},{"type":"Feature","properties":{"resourceCoords":[-101.0,861.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.67645184111402,39.29527981003215]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0854/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p854","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.95"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0854/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0854","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"684.8,1291.9 177.8,1289.3 138.7,857.8 291.3,539.6 250.4,251.9 301.8,204.9 544.1,186.6 617.0,101.2 791.0,281.8 939.6,292.8 955.0,443.5 953.5,443.4 947.8,498.8 955.7,498.8 955.7,893.0 954.2,1294.1 684.8,1291.9\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0854/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[686.0,1290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68140738821253,39.29788684431629]}},{"type":"Feature","properties":{"resourceCoords":[152.0,1290.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68149462811422,39.299348746334395]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0855/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p855","metadata":[{"label":"streets","value":"0"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.96"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0855/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0855","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"682.2,13.7 949.8,18.5 947.2,555.3 943.5,735.5 943.0,873.0 936.9,1316.2 158.8,1321.5 126.5,1285.4 137.4,218.4 173.8,93.1 178.7,6.1 682.2,13.7\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0855/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[675.0,1075.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6851937339574,39.29774578909311]}},{"type":"Feature","properties":{"resourceCoords":[675.0,1325.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.68608366287187,39.29770718895463]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0856/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p856","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"21"},{"label":"confidence","value":"0.57"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0856/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0856","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"333.1,1251.2 257.5,1181.6 279.4,953.8 189.4,491.3 128.9,363.7 117.5,250.0 116.3,195.9 123.6,100.2 156.0,104.0 254.9,104.8 296.0,105.2 328.7,105.6 381.2,105.7 757.0,141.3 799.3,165.2 806.1,171.5 807.3,172.6 873.1,232.1 920.5,263.3 933.6,268.1 947.4,271.7 929.7,844.2 923.9,844.1 922.7,996.6 921.4,1248.8 530.9,1245.5 356.9,1244.5 338.8,1249.7 333.1,1251.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0856/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[726.0,996.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6624375,39.3124932]}},{"type":"Feature","properties":{"resourceCoords":[726.0,686.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6602653,39.3125819]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0857/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p857","metadata":[{"label":"streets","value":"9"},{"label":"intersections","value":"17"},{"label":"confidence","value":"0.99"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0857/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0857","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"125.2,367.2 125.1,216.8 516.1,124.0 516.1,110.4 538.0,110.8 638.1,112.1 904.5,111.8 904.0,495.9 905.7,686.6 908.3,1250.0 904.8,1248.4 293.0,1308.6 152.6,1287.7 125.5,1237.7 125.2,367.2\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0857/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[517.0,879.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6513585,39.310761]}},{"type":"Feature","properties":{"resourceCoords":[125.0,113.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.6528843,39.3128326]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0867/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p867","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"2"},{"label":"confidence","value":"0.01"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0867/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0867","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"831.1,542.5 836.2,543.1 867.6,868.7 885.4,885.6 926.2,1189.9 930.0,1189.0 911.3,1249.7 877.1,1257.6 875.8,1277.0 755.6,1288.5 698.7,1318.8 477.4,1330.0 357.7,1300.5 236.8,1294.7 161.7,1039.3 130.0,1001.9 128.0,952.4 167.1,909.9 167.9,772.0 158.2,746.6 119.1,737.4 95.8,693.1 97.2,466.9 77.7,411.7 90.0,238.9 73.4,203.0 89.3,170.0 174.9,157.9 295.8,215.4 592.3,198.8 614.3,157.0 611.0,77.5 618.6,51.3 719.0,83.8 746.0,82.7 831.1,542.5\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0867/gcps","type":"FeatureCollection","transformation":{"type":"helmert"},"features":[{"type":"Feature","properties":{"resourceCoords":[735.0,1248.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.7020376,39.2923742]}},{"type":"Feature","properties":{"resourceCoords":[177.0,1052.0],"type":"gcp"},"geometry":{"type":"Point","coordinates":[-76.7064881,39.2937456]}}]}},{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0868/georef","type":"Annotation","@context":["http://iiif.io/api/extension/georef/1/context.json","http://iiif.io/api/presentation/3/context.json"],"label":"Baltimore, Maryland | 1953 | sanborn03573_045 p868","metadata":[{"label":"streets","value":"5"},{"label":"intersections","value":"0"},{"label":"confidence","value":"0.49"},{"label":"confidence_model","value":"corpus-v2"}],"created":"2026-10-18T16:33:16Z","modified":"2026-10-18T16:33:16Z","motivation":"georeferencing","target":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0868/selector","type":"SpecificResource","source":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0868","type":"ImageService3","width":1088,"height":1350},"selector":{"type":"SvgSelector","value":"<svg><polygon points=\"228.0,1318.0 245.4,971.7 229.2,949.1 261.5,581.0 255.9,579.3 256.2,51.0 310.3,58.7 360.1,36.4 527.2,53.0 611.8,131.4 817.7,185.6 908.8,287.1 970.6,300.9 974.4,360.4 1011.5,392.7 1057.8,549.2 1027.9,569.5 999.0,548.1 996.0,518.2 909.3,505.8 885.9,531.9 831.8,789.4 856.1,893.6 845.3,1007.6 826.1,1005.8 761.2,1293.4 716.5,1295.3 633.4,1281.7 565.3,1311.2 471.1,1317.3 239.7,1303.8 232.3,1317.8 228.0,1318.0\" /></svg>"}},"body":{"id":"https://cdn.chronoscope.io/mapsnap/service:gmd:gmd384m:g3844m:g3844bm:g3844bm_g03573195308:03573_08_1953-0868/gcps","type":"FeatureCollection","transformation":{"type":"polynomial","options":{"order":1}},"features":[{"type":"Feature","properties":{"resourceCoords":[0.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.703431,39.2997478]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,0.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6957101,39.3006053]}},{"type":"Feature","properties":{"resourceCoords":[1088.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.6943352,39.293191300000004]}},{"type":"Feature","properties":{"resourceCoords":[0.0,1350.0],"type":"corner"},"geometry":{"type":"Point","coordinates":[-76.7020561,39.2923338]}}]}}]}