Opening Earth imagery bridge

Western United States: NASA Blue Marble Next Generation cloud-free surface imagery, served by NASA EOSDIS GIBS. California coastal detail: NASA/USGS Landsat WELD v3.1 annual true-color surface reflectance (2000), served by NASA EOSDIS GIBS. Ocean and WELD no-data coverage are filled from the pixel-aligned Blue Marble Next Generation photographic source. No AI-generated geography.

NASA GIBS: https://www.earthdata.nasa.gov/engage/open-data-services-and-software/api/gibs
Blue Marble Next Generation: https://science.nasa.gov/earth/earth-observatory/blue-marble-next-generation/base-topography-bathymetry/
Landsat / WELD layer: Landsat_WELD_CorrectedReflectance_TrueColor_Global_Annual

Exact source service requests, geographic bounds, processing, source hashes, and published asset hashes are in opening-imagery.json.