OpenLayers

Class: Sphere

ol.Sphere

Class to create objects that can be used with ol.geom.Polygon.circular.

For example to create a sphere whose radius is equal to the semi-major axis of the WGS84 ellipsoid:

var wgs84Sphere= new ol.Sphere(6378137);

new ol.Sphere(radius)

src/ol/sphere.js, line 29
Name Type Description
radius number

Radius.

Methods

geodesicArea(coordinates){number}

src/ol/sphere.js, line 53

Returns the geodesic area for a list of coordinates.

Reference Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion Laboratory, Pasadena, CA, June 2007

Name Type Description
coordinates Array.<ol.Coordinate>

List of coordinates of a linear ring. If the ring is oriented clockwise, the area will be positive, otherwise it will be negative.
Returns:
Area.

haversineDistance(c1, c2){number}

src/ol/sphere.js, line 77

Returns the distance from c1 to c2 using the haversine formula.

Name Type Description
c1 ol.Coordinate

Coordinate 1.
c2 ol.Coordinate

Coordinate 2.
Returns:
Haversine distance.