Mapbox Terrain-RGB (elevation tiles)
Open BetabetaTerrain-RGB és un format de tessel·les de Mapbox/MapLibre els canals RGB del qual codifiquen l'elevació real a partir de SRTM/ALOS. OpenStreetMap no inclou dades d'elevació, de manera que sense una font de DEM externa no hi ha cap sortida honesta. L'API retorna HTTP 501: utilitza l'exportador HGT per obtenir SRTM real.
OpenStreetMap data as of 5 October 2026 · 12 days ago
Característiques clau
Sobre el format Terrain-RGB
Terrain-RGB is a way to pack elevation into an ordinary PNG: Mapbox encodes meters into the R, G and B channels with the formula height = -10000 + ((R × 256² + G × 256 + B) × 0.1). MapLibre and Mapbox GL read such tiles and build relief and three-dimensional terrain from them right in the browser.
On osm2cdr the heights do not come from OpenStreetMap — OSM has none — but from the global Copernicus DEM elevation model at 30 m (SRTM where it is missing). The service clips the model to your area, reprojects it to Web Mercator and encodes every pixel's height separately in 0.1 m steps. If the whole area has no heights, such as open sea, the order is refused honestly instead of shipping flat tiles.
You get a ZIP: PNG tiles in z/x/y folders plus a metadata.json with the zoom, area, formula and the source model name. One order holds up to 256 tiles and the zoom is fitted to the area. Pixels outside the model's coverage encode 0 m. Accuracy is that of the source model: visualisation and pre-design, not surveying.
Quin programa obre els fitxers Terrain-RGB
Els programes i les aplicacions següents poden obrir, editar i treballar amb fitxers Mapbox Terrain-RGB (elevation tiles) (.zip) exportats des d'OSM2CDR:
Format specifications
- Open standard
- 3D coordinates supported
- Lossless (no quality loss)
- No attributes
- Output: 256 files in archive
- Mapbox Terrain-RGB tile set. Elevation encoded in RGB pixels: height = -10000 + ((R*256² + G*256 + B) * 0.1).
Qui utilitza els mapes Terrain-RGB
Com exportar Terrain-RGB
Com obrir el fitxer després de l'exportació
- MapLibre GL — unpack the archive on your server, add it as a raster-dem source with encoding: "mapbox" and call map.setTerrain — the relief appears in the style.
- Mapbox GL and deck.gl — the same set works as a terrain source or a TerrainLayer with the same decoding formula.
- rio-mbtiles or mb-util — pack the z/x/y folder into a single MBTiles if your tile server prefers one file.
- QGIS — open a single tile as a raster and decode the height with the raster calculator: -10000 + (R·65536 + G·256 + B)·0.1.
Mapes populars en Terrain-RGB
Obtingues exportacions de mapes Mapbox Terrain-RGB (elevation tiles)
Descarrega mapes Terrain-RGB professionals d'OpenStreetMap. Generació instantània, qualsevol àrea.