Legacy

Mapbox.js is no longer in active development. To learn more about our newer mapping tools see Mapbox GL JS.

IProjection

An object with methods for projecting geographical coordinates of the world onto a flat surface (and back). See Map projection.

Methods

Method Returns Description
project( <LatLng> latlng ) Point Projects geographical coordinates into a 2D point.
unproject( <Point> point ) LatLng The inverse of project. Projects a 2D point into geographical location.

Defined Projections

Leaflet comes with a set of already defined projections out of the box:

Projection Description
L.Projection.SphericalMercator Spherical Mercator projection — the most common projection for online maps, used by almost all free and commercial tile providers. Assumes that Earth is a sphere. Used by the EPSG:3857 CRS.
L.Projection.Mercator Elliptical Mercator projection — more complex than Spherical Mercator. Takes into account that Earth is a geoid, not a perfect sphere. Used by the EPSG:3395 CRS.
L.Projection.LonLat Equirectangular, or Plate Carree projection — the most simple projection, mostly used by GIS enthusiasts. Directly maps x as longitude, and y as latitude. Also suitable for flat worlds, e.g. game maps. Used by the EPSG:3395 and Simple CRS.