DISTANCEV

Returns the distance (in kilometers) between two points using the Vincenty formula. Because the Vincenty formula includes the parameters of the WGS-84 ellipsoid model, you need not specify a radius of curvature. You specify the latitude and longitude of both the starting point and the ending point. This function is more accurate, but will be slower, than the DISTANCE function.

Behavior type

Syntax

DISTANCEV (lat0, lon0, lat1, lon1);

Arguments

lat0

Specifies the latitude of the starting point.

lon0

Specifies the longitude of the starting point.

lat1

Specifies the latitude of the ending point.

lon1

Specifies the longitude of the ending point.

Examples

This example finds the distance in kilometers for 1 degree of longitude at latitude 45 degrees, assuming earth is ellipsoidal.

SELECT DISTANCEV(45,0, 45,1);
    distanceV
------------------
 78.8463347095916
(1 row)