dist()
Returns the distance in kilometers between two sites.
Synopsis
dist(site_id_1, site_id_2)
Description
This function returns the distance in kilometers between two sites. The sites
are identified by their site id. Returns the distance in km between the sites
whose ids are represented by the arguments arg1 and arg2.
Parameters
arg1The id of a location.
arg2The id of another location.
Returns
The distance in kilometers between the two locations, as a decimal value.
Examples
If there are two locations with ids 000000001 and 000000002, then the distance between these two locations can be determined and stored in a user-defined variable test_distance with:
test_distance = dist(000000001, 000000002)
Notes
The distance returned by this expression is Cartesian distance, meaning that it is subject to distortion from the map projection used. If the geographic coordinates are far apart, the result may not be extremely accurate.