{
  "elevation": "Copernicus DEM from the existing prepared study grid; terrain height, not flood depth; approximately 30 m source",
  "hillshade": "Derived from elevation; northwest illumination; not a separate measurement",
  "night_lights": "See ntl_source.json. August 2023 monthly radiance, approximately 500 m; display capped at 10; negative noise values display as zero; cloud-free observation counts unavailable, so dark areas are inconclusive",
  "terrain": "Downsampled elevation mesh; gaps preserved; height exaggeration adjustable; not a hydraulic simulation"
}