projection
Projections are methods of transforming the coordinates of locations on a three-dimensional planet to a two-dimensional plane.
Mapbox GL JS supports displaying maps in the following projections:
- Globe: A view of Earth from space
- Equal-area projections: Relative size of areas is accurate, but shapes are distorted
- Conformal projections: Shapes and angles are accurate, but sizes are distorted
- Web Mercator, the default
- Lambert conformal conic
- Compromise projections: A balance of size and shape distortion
Learn more about the uses of each in the Mapbox GL JS projection guide.
Mapbox tools accept coordinate inputs as follows:
- Mapbox Tiling Service and Mapbox SDKs for mobile and web accept GeoJSON that follows the GeoJSON standard for a geographic coordinate reference system equivalent to OGC:CRS84, using the WGS84 datum, decimal degrees, and longitude and latitude units (in that order).
- The Mapbox Uploads API accepts data inputs in a variety of formats and projections.
Note on EPSG:4326
Later versions of the EPSG:4326 coordinate reference
system order coordinates as latitude,longitude, which is the reverse order
of coordinates in OGC:CRS84. Most Mapbox upload tools require coordinates
ordered as longitude,latitude.
Related resources:
- Uploading data getting started guide
- Adaptive projections in Mapbox GL JS
- Example: Use different map projections for web maps
- Map projection Wikipedia page
- Web Mercator Wikipedia page
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