Coasty cinematic journey terrain sources

hayes-naip-15km.jpg and hayes-naip-2400m.jpg
Publisher: USDA / USGS National Map, National Agriculture Imagery Program (NAIP).
Source service: https://imagery.nationalmap.gov/arcgis/rest/services/USGSNAIPImagery/ImageServer
Program: https://www.usgs.gov/centers/eros/science/usgs-eros-archive-aerial-photography-national-agriculture-imagery-program-naip
Rights: Public domain. The source service explicitly identifies NAIP as public-domain aerial imagery.
Credit: USGS, USDA, The National Map: Orthoimagery. January 09, 2025.
Downloaded: 2026-10-26. Acquisition dates can vary across the source mosaic.
Both images are unmodified NaturalColor JPEG exports of the official NAIP service, 4000 x 4000 pixels, north up, UTM Zone 10N (EPSG:32610).
Common center: latitude 37.7764, longitude -122.4242 (Hayes Valley, San Francisco).
Regional extent: 15000 x 15000 metres, 3.75 metres/pixel.
Detail extent: 2400 x 2400 metres, 0.6 metres/pixel.
Exact extents, source requests, SHA-256 hashes and output metadata: hayes-naip-downloads.json.
World-to-imagery mapping and original Landsat registration: hayes-georeference.json.

These are actual orthorectified aerial photographs, with baked lighting/shadows and visible capture seams over water. The landing page's near street model is an illustrative environment, not an exact photogrammetric replica of this location.


hayes-elevation-257.json
Publisher: USGS National Map 3D Elevation Program (3DEP).
Source: https://elevation.nationalmap.gov/arcgis/rest/services/3DEPElevation/ImageServer
Program: https://www.usgs.gov/3d-elevation-program/about-3dep-products-services
Rights: All 3DEP products are public domain.
Rights source: https://catalog.data.gov/dataset/1-meter-digital-elevation-models-dems-usgs-national-map-3dep-downloadable-data-collection
Credit: USGS National Map 3D Elevation Program (3DEP). October 01, 2026.
Downloaded: 2026-10-26.
Raw F32 TIFF exported with raster function None, bilinear sampling, 257 x 257 pixels over the exact 15 km NAIP extent. Values converted to JSON metres and rounded to centimetres; no terrain was fabricated.
Row order north to south; columns west to east. Samples represent pixel centers, so a UV coordinate maps to index UV*257 - 0.5 (invert north-up V for array rows).
Actual height at origin is 21.52 m; page local terrain should subtract that datum to keep the origin at y=0.
Original elevation range: -1.95 to 279.01 m. Actual SF hills, shoreline, and northern headland relief.
Export metadata and source request: hayes-dem-15km-source.json.


hayes-buildings.json
Data: © OpenStreetMap contributors, licensed under the Open Database License (ODbL) 1.0.
Attribution and copyright: https://www.openstreetmap.org/copyright
License: https://opendatacommons.org/licenses/odbl/1-0/
Source API: https://overpass-api.de/api/interpreter
Source data timestamp: 2026-10-26T21:27:50Z.
The source query returned 4032 building ways around Hayes Valley. This reusable derived dataset contains 3993 polygons with original OSM ids, local metric footprints and height source metadata. Thirty-nine polygons overlapping the illustrative street's bounds plus a 6m safety margin were excluded.
2973 heights come directly from OSM height tags; 115 are estimated from OSM building:levels times 3.1m; 905 use an illustrative default height of 8m. Facade materials and windows are illustrative, not reconstructed architectural surveys.
Coordinates can be converted back to EPSG:32610 using hayes-georeference.json, with origin latitude 37.7764 / longitude -122.4242.
Download/reuse: /media/cinematic/hayes-buildings.json

hayes-naip-15km-2k.jpg and hayes-naip-2400m-2k.jpg
Mobile derivatives of the corresponding public-domain 4000px NAIP files above. Resampled to 2000 x 2000 with Lanczos filtering, JPEG quality 87. Same geographic extents and coordinates; no creative alteration.