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Geography and geometry

Additional Developer Resources

General utilities and types that relate to working with and manipulating geographic information or geometries.

LngLat

githubsrc/geo/lng_lat.ts

A LngLat object represents a given longitude and latitude coordinate, measured in degrees. These coordinates use longitude, latitude coordinate order (as opposed to latitude, longitude) to match the GeoJSON specification, which is equivalent to the OGC:CRS84 coordinate reference system.

Note that any Mapbox GL method that accepts a LngLat object as an argument or option can also accept an Array of two numbers and will perform an implicit conversion. This flexible type is documented as LngLatLike.

new LngLat(lng: number, lat: number)

Parameters

lng(number)Longitude, measured in degrees.
lat(number)Latitude, measured in degrees.

Example

const ll = new mapboxgl.LngLat(-123.9749, 40.7736);
console.log(ll.lng); // = -123.9749

Static Members

Instance Members

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LngLatBounds

githubsrc/geo/lng_lat.ts

A LngLatBounds object represents a geographical bounding box, defined by its southwest and northeast points in longitude and latitude. Longitude values are typically set between -180 to 180, but can exceed this range if renderWorldCopies is set to true. Latitude values must be within -85.051129 to 85.051129.

If no arguments are provided to the constructor, a null bounding box is created.

Note that any Mapbox GL method that accepts a LngLatBounds object as an argument or option can also accept an Array of two LngLatLike constructs and will perform an implicit conversion. This flexible type is documented as LngLatBoundsLike.

new LngLatBounds(sw: LngLatLike?, ne: LngLatLike?)

Parameters

sw(LngLatLike?)The southwest corner of the bounding box.
ne(LngLatLike?)The northeast corner of the bounding box.

Example

const sw = new mapboxgl.LngLat(-73.9876, 40.7661);
const ne = new mapboxgl.LngLat(-73.9397, 40.8002);
const llb = new mapboxgl.LngLatBounds(sw, ne);

Static Members

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LngLatBoundsLike

githubsrc/geo/lng_lat.ts

A LngLatBounds object, an array of LngLatLike objects in [sw, ne] order, or an array of numbers in [west, south, east, north] order.

Type

(LngLatBounds | [LngLatLike, LngLatLike] | [number, number, number, number])

Example

const v1 = new mapboxgl.LngLatBounds(
  new mapboxgl.LngLat(-73.9876, 40.7661),
  new mapboxgl.LngLat(-73.9397, 40.8002)
);
const v2 = new mapboxgl.LngLatBounds([-73.9876, 40.7661], [-73.9397, 40.8002]);
const v3 = [[-73.9876, 40.7661], [-73.9397, 40.8002]];
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LngLatLike

githubsrc/geo/lng_lat.ts

A LngLat object, an array of two numbers representing longitude and latitude, or an object with lng and lat or lon and lat properties.

Type

(LngLat | {lng: number, lat: number} | {lon: number, lat: number} | [number, number])

Example

const v1 = new mapboxgl.LngLat(-122.420679, 37.772537);
const v2 = [-122.420679, 37.772537];
const v3 = {lon: -122.420679, lat: 37.772537};
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MercatorCoordinate

githubsrc/geo/mercator_coordinate.ts

A MercatorCoordinate object represents a projected three dimensional position.

MercatorCoordinate uses the web mercator projection (EPSG:3857) with slightly different units:

  • the size of 1 unit is the width of the projected world instead of the "mercator meter"
  • the origin of the coordinate space is at the north-west corner instead of the middle.

For example, MercatorCoordinate(0, 0, 0) is the north-west corner of the mercator world and MercatorCoordinate(1, 1, 0) is the south-east corner. If you are familiar with vector tiles it may be helpful to think of the coordinate space as the 0/0/0 tile with an extent of 1.

The z dimension of MercatorCoordinate is conformal. A cube in the mercator coordinate space would be rendered as a cube.

new MercatorCoordinate(x: number, y: number, z: number)

Parameters

x(number)The x component of the position.
y(number)The y component of the position.
z(number)(default 0)The z component of the position.

Example

const nullIsland = new mapboxgl.MercatorCoordinate(0.5, 0.5, 0);

Static Members

Instance Members

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Point

githubsrc/ui/map.ts

A Point geometry object, which has x and y properties representing screen coordinates in pixels.

Type

Point

Example

const point = new mapboxgl.Point(-77, 38);
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PointLike

githubsrc/ui/map.ts

A Point or an array of two numbers representing x and y screen coordinates in pixels.

Type

(Point | Array<number>)

Example

const p1 = new mapboxgl.Point(-77, 38); // a PointLike which is a Point
const p2 = [-77, 38]; // a PointLike which is an array of two numbers
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