Projection

Type class

This is a base class for a geographical projection.

Sources

Projection can be used (imported) via one of the following packages.

TypeScript

/**
 * Import from: "maps.ts"
 * Use like: am4maps.Projection
 */
import * as am4maps from "@amcharts/amcharts4/maps";

JavaScript

/**
 * Include via: <script src="maps.js"></script>
 * Access items like: am4maps.Projection
 */

Inheritance

Projection does not extend any other symbol.

Projection is extended by Albers, AlbersUsa, AzimuthalEqualArea, Eckert6, EqualEarth, Mercator, Miller, NaturalEarth1, Orthographic, Stereographic.

Properties

#d3Projection

Type GeoProjection

d3 projection d3 projection

Methods

#constructor()

Returns Projection

#convert(geoPoint: IGeoPoint)

Returns IPoint

Converts a geographical point (lat/long) to a screen point (x/y)

#distance(pointA: IGeoPoint,
pointB: IGeoPoint)

Returns number

#intermediatePoint(pointA: IGeoPoint,
pointB: IGeoPoint,
position: number)

Returns IGeoPoint

#invert(point: IPoint)

Returns IGeoPoint

Converts a screen point (x/y) to a geographical point (lat/long)

#multiDistance(multiGeoLine: Array <Array <IGeoPoint>>)

Returns number

#positionToGeoPoint(multiGeoLine: Array <Array <IGeoPoint>>,
position: number)

Returns IGeoPoint

Converts relative position along the line (0-1) into pixel coordinates.

#positionToPoint(multiGeoLine: Array <Array <IGeoPoint>>,
position: number)

Returns IOrientationPoint

Converts relative position along the line (0-1) into pixel coordinates.

#project(lambda: number,
phi: number)

Returns IPoint

Deprecated Deprecated

Returns X/Y coordinates.

Individual projections will override this method to apply their own projection logic.

#unproject(x: number,
y: number)

Returns IGeoPoint

Deprecated Deprecated

Returns geographical coordinates (lat/long).

Individual projections will override this method to apply their own projection logic.

Events

Projection does not have any events.