ncf (version 1.1-7)

gcdist: Greater circle distance

Description

Greater circle distance function to calculate spatial distance from lat-long data. Called by various functions.

Usage

gcdist(x1, y1, x2, y2)

Arguments

x1

longitude 1.

x2

longitude 2.

y1

latitude 1.

y2

latitude 2.

Value

The distance in km is returned

Details

Function for great circle distance -- due to T. Keitt.