{"retrieved":"2026-10-06T16:57:24.282418+00:00","sources":[{"file":"terrain-wittenberg-20m.tif","url":"https://www.geodatenportal.sachsen-anhalt.de/ows_WCS_ST_DGM1?service=WCS&version=1.0.0&request=GetCoverage&coverage=1&format=GeoTIFF&crs=EPSG:25832&bbox=737500,5744500,761500,5771000&resx=20&resy=20","sha256":"39e2235693d91394940f274c4b8d7b2a958270e432a85c7e66df7fd2c97a40f8","license":"DL-DE-BY-2.0","provider":"© GeoBasis-DE / LVermGeo ST","requested_resolution_m":20,"survey_date":"Mixed source dates, not asserted as a 2026 survey"},{"file":"public-places.json","endpoint":"https://overpass-api.de/api/interpreter","query":"[out:json][timeout:120];(\n      nwr[amenity~\"^(school|kindergarten|pharmacy|library)$\"](51.78,12.42,52.06,12.83);\n      nwr[shop~\"^(supermarket|convenience)$\"](51.78,12.42,52.06,12.83);\n      nwr[tourism=museum](51.78,12.42,52.06,12.83);\n      nwr[railway~\"^(station|halt)$\"](51.78,12.42,52.06,12.83);\n      way[waterway=river](51.78,12.42,52.06,12.83);\n      way[natural=water](51.78,12.42,52.06,12.83);\n    );out center geom;","sha256":"3ee0b53fdbd46337f527eb44c2f3815664d99c00826d4562e31cf34fff49fc1a","osm_base":"2026-10-06T16:55:10Z","license":"ODbL-1.0","provider":"OpenStreetMap contributors"}],"version":1,"origin":[749580.6000000001,5757871.981000001,60],"bbox":[-12080.600000000093,-13371.981000000611,11919.399999999907,13128.018999999389],"terrain_grid_m":100,"terrain_sample_m":20,"terrain_valid_city_fraction":1.0,"height_range_city_m":[61.9,187.5],"terrain_bytes":2340436,"terrain_sha256":"4755d21e5acb70c18e0788ce96c8b5a75845d685c301ff0dacc49a94b5733640","context_sha256":"ab29691e1d392d91b25a9e169804c503c5a93fe3ed78b1c88198e90909a0f9ad","walking_speed_m_per_min":80,"entry_max_snap_m":200,"destination_max_snap_m":80,"excluded":{"duplicate":1},"network_source":{"version":"MGA-angular-1.0","source":{"downloaded_utc":"2026-10-06T14:07:36.162689+00:00","osm_base":"2026-05-06T03:25:00Z","endpoint":"https://overpass.private.coffee/api/interpreter","query":"[out:json][timeout:180];way[highway](51.7935824,12.4485534,52.0373274,12.8109002);out body geom; nwr[place][name](51.7935824,12.4485534,52.0373274,12.8109002);out center;","bbox_wgs84":[51.79358235899099,12.448553368609808,52.03732743777317,12.810900177148126],"buffer_metres":2000,"sha256":"b657aa47591f8ee9c34b106043ecd12c50133a6b3b578b93d55e28ace3dd54f1","license":"ODbL-1.0","license_url":"https://opendatacommons.org/licenses/odbl/1-0/","attribution":"© OpenStreetMap contributors","elements":13543},"license":"ODbL-1.0","license_url":"https://opendatacommons.org/licenses/odbl/1-0/","attribution":"© OpenStreetMap contributors","model":"Undirected walking network represented by oriented segment states. No vehicle one-way rules. No travel-time or footfall prediction.","simplification_metres":3,"angular_bins":4096,"straight_transition_minimum":0.000244140625,"radii_metres":[800,2000],"local_radius_definition":"Induced segment-state subgraph of the shortest metric-network midpoint catchment. Angular routes may be longer than the catchment radius. Not an exact depthmapX Tulip metric-radius replication.","normalisation":{"NAIN":"NC^1.2 / angular total depth","NACH":"log(choice+1) / log(angular total depth+3)","choice":"All source segments, endpoints excluded, oriented minimum paths shared across ties, ordered sum / 2","small_components":"Fewer than 5 reachable segments: colour and normalised values withheld"},"segment_count":37724,"municipal_segments":21357,"components":85,"largest_component_segments":37306,"excluded_ways":{"access_excluded":543,"class_excluded":127},"district_boundary_definition":"Neighbourhood views centred on mapped named places; not statutory district boundaries.","colour_classification":{"type":"municipal quintiles per measure and radius except fixed connectivity classes 1,2,3,4","direction":"blue low, cyan, green, yellow, red high; mean angular depth is reversed: red low depth","same_thresholds_for_all_districts":true},"methods":["https://www.spacesyntax.net/","https://github.com/SpaceGroupUCL/depthmapX/blob/master/docs/howdoi.md","https://discovery.ucl.ac.uk/1389938/1/Normalising%20least%20angle%20choice.pdf","https://www.spacesyntax.online/applying-space-syntax/urban-methods-2/spatial-form-analysis/"],"additional_measures":{"connectivity":"Number of unique directly adjacent segments in the source graph","mean_angular_depth":"Angular total depth / (reachable segment count - 1); withheld for fewer than 5 reachable segments; not harmonic mean depth","animation":"Relative density by NACH class, bidirectional symbols, equal screen speed, optional playback; no observed traffic volume or measured speed"},"potential_screening":{"criteria":"Connected named street group medians: NAIN R800 and NACH R2000 both >= municipal 80th-percentile segment thresholds; at least 2 assessed segments","local_extent_metres":600,"maximum_points":3,"minimum_point_separation_metres":{"local":200,"city":700},"interpretation":"Spatial study points, not development rights, available property or economic suitability."},"coordinate_reference":{"epsg":25832,"xy_origin":[749580.6000000001,5757871.981000001],"units":"metres","axis":"easting, northing"},"computed_date":"2026-10-06","engine_sha256":"91e4b3657e0818c09c1abef941e7982f5535fa1dfcadd38b871fcdabc9930b96","prepared_graph_sha256":"e00dcb816852bfd82186c5993d1d18c5e5a9ef79d608cfbc2953d60517cc7c6a","results_sha256":"d639d44c3436a8c3a2f1985d53eabeb286a9f48b4196510c0a41069e77203b1a","landmark_source_sha256":"5702aedbd4475b01b759cb0a37471a74dacd26c0a7eafc6f8db296445ae62e10","third_party_layers":{"municipal_boundary":{"attribution":"© GeoBasis-DE / LVermGeo ST","license":"DL-DE-BY-2.0","url":"https://www.govdata.de/dl-de/by-2-0"}},"access_limitations":"Tagged way access restrictions excluded; unmapped restrictions and point-only barriers are not verified. Not a routing service."},"method":"Shortest undirected endpoint routes via shared OSM nodes; start/end projected to nearest mapped segments, straight attachment distances included. Facility centre is not a verified entrance. No opening times, real footfall, traffic signals or slope-adjusted travel times."}