Ngl.gc_dist

Calculates the distance in degrees along a great circle between two points.

Prototype

dist = Ngl.gc_dist(lat1, lon1, lat2, lon2)

Arguments

Latitude and longitude of first point on the globe.

Latitude and longitude of second point on the globe.

Return value

The distance along the great circle, in degrees, between the two input points.

Description

This function calculates the distance in degrees along a great circle between two points on the globe. The arguments lat1 and lon1 specify the latitude and longitude of the first point on the globe; the arguments lat2 and lon2 specify the latitude and longitude of the second point on the globe. The returned distance is always a positive number. If you want the returned distance expressed in some other units, use Ngl.gc_convert.

See Also

Ngl.gc_convert, Ngl.gc_dist, Ngl.gc_inout, Ngl.gc_interp, Ngl.gc_qarea, Ngl.gc_tarea

Examples

The following:

  import Ngl
  dist = Ngl.gc_dist(0., -90., 0., -110.)
  print "Great circle distance = " + str(dist) + " degrees"

  Great circle distance = 20.0 degrees