Mapterhorn is an innovative open data project led by Oliver, formerly of MapLibre, that provides high-quality terrain data through PMTiles format. The platform combines global datasets like ESA’s Copernicus GLO-30 with high-resolution regional data, including swissALTI3D for Switzerland and newly added Japan coverage at 1m, 5m, and 10m resolutions. This enables developers to build detailed 3D map applications using MapLibre GL JS and PMTiles protocols.

By integrating Mapterhorn terrain sources, developers can render realistic hillshades and 3D terrains with minimal setup. The tutorial demonstrates how to configure a local MapLibre environment, implement tile protocols, and visualize interactive 3D maps. This advancement significantly benefits geospatial developers, GIS professionals, and researchers requiring accurate elevation data for environmental analysis, urban planning, or immersive mapping experiences.

It also promotes open data accessibility and supports the broader open-source mapping ecosystem.