Spherical - OpenLayers

# Spherical

The OpenLayers.Spherical namespace includes utility functions for calculations on the basis of a spherical earth (ignoring ellipsoidal effects), which is accurate enough for most purposes.

#### Relevant links

- http://www.movable-type.co.uk/scripts/latlong.html
- http://code.google.com/apis/maps/documentation/javascript/reference.html#spherical

Summary

Spherical | The OpenLayers.Spherical namespace includes utility functions for calculations on the basis of a spherical earth (ignoring ellipsoidal effects), which is accurate enough for most purposes.
Functions |
computeDistanceBetween | Computes the distance between two LonLats.
computeHeading | Computes the heading from one LonLat to another LonLat.

### Functions

### computeDistanceBetween

> OpenLayers.Spherical.computeDistanceBetween = function( | from,
> | to,
> | radius | )

Computes the distance between two LonLats.

#### Parameters

from | {OpenLayers.LonLat} or {Object} Starting point. A LonLat or a JavaScript literal with lon lat properties.
to | {OpenLayers.LonLat} or {Object} Ending point. A LonLat or a JavaScript literal with lon lat properties.
radius | {Float} The radius. Optional. Defaults to 6378137 meters.

#### Returns

{Float} The distance in meters.

### computeHeading

> OpenLayers.Spherical.computeHeading = function( | from,
> | to | )

Computes the heading from one LonLat to another LonLat.

#### Parameters

from | {OpenLayers.LonLat} or {Object} Starting point. A LonLat or a JavaScript literal with lon lat properties.
to | {OpenLayers.LonLat} or {Object} Ending point. A LonLat or a JavaScript literal with lon lat properties.

#### Returns

{Float} The heading in degrees.

> OpenLayers.Spherical.computeDistanceBetween = function( | from,
> | to,
> | radius | )

Computes the distance between two LonLats.

> OpenLayers.Spherical.computeHeading = function( | from,
> | to | )

Computes the heading from one LonLat to another LonLat.
This class represents a longitude and latitude pair
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