For AI agents: a documentation index is available at /llms.txt. Markdown versions of all pages are available by appending .md to any URL.
Global RGB bathymetry tileset
Bathymetry is describing the underwater depth of ocean floors. Together with the topographical data, a global relief model can be created.
The encoding process is the same as in the RGB Terrain by MapTiler: the elevation is split into tiles and each tile has elevations encoded in a WebP image where each pixel color (red, green, blue) can be turned into elevation using a smart formula:
elevation = -10000 + ((R * 256 * 256 + G * 256 + B) * 0.1)
The format allows storing elevations very efficiently (3 bytes vs. 4 or 8 bytes in the case of floating-point numbers) with sufficient precision.
We are already using the dataset as a hillshade layer in the Ocean map:
