ASCII WALK - DATA AND ASSET NOTICES

Bundled third-party software notices are in THIRD_PARTY_NOTICES.txt.
Source and retained geography: https://github.com/mgelsinger/asciiwalk

Map data from OpenStreetMap contributors.
https://www.openstreetmap.org/copyright
Open Database License 1.0: https://opendatacommons.org/licenses/odbl/1-0/
The prepared map geometry and terrain are distributed as an identified data pack,
separate from application code. OSM-derived adapted data remains available under
ODbL. Its machine-readable form is in worlds/<world-id>/features.json and
manifest.json. Source snapshots and the transformation tools accompany this project.

Overture Maps Foundation buildings, release 2026-08-19.0. The bounded Warsaw extract
lists OpenStreetMap and Microsoft ML Buildings as upstream datasets.
Buildings theme: ODbL 1.0. Microsoft ML Buildings: ODbL 1.0.
https://docs.overturemaps.org/attribution/
https://github.com/microsoft/GlobalMLBuildingFootprints
The Warsaw pack transfers height only after geometric matching. It does not
redistribute source imagery. Match IDs, overlap scores, and the actual upstream
source records are retained in each matched building's heightMatch field.

Terrain: USGS 3D Elevation Program, numeric elevation export.
https://www.usgs.gov/3d-elevation-program
https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer
Native orthometric elevations in meters. Export parameters and checksums are
recorded in the source cache and world manifest. Values are reprojected/resampled.

Town index: GeoNames cities500, Creative Commons Attribution 4.0.
https://www.geonames.org/
https://download.geonames.org/export/dump/readme.txt
https://creativecommons.org/licenses/by/4.0/
The local index is filtered to the supported US region and uses ASCII place names.

Font: IBM Plex Mono, IBM Corp. SIL Open Font License 1.1.
Bundled through @fontsource/ibm-plex-mono. See FONT_LICENSE.txt.

Architectural reference photographs remain in the local research cache and are
not included as images or textures in the application. Reference page links and
authors, dates and license URLs are included in REFERENCE_SOURCES.json. All displayed
geometry, material patterns, people, vehicles and ASCII processing are authored
for this application. Dated references are not a guarantee of current appearance.