[GRASS-user] 6.3 v.distance description faulty / ll degrees notmeters

Martin Landa landa.martin at gmail.com
Thu Aug 14 14:50:10 EDT 2008


2008/8/14 Patton, Eric <epatton at nrcan.gc.ca>:
>>> I can confirm 'dist' units are indeed given in decimal degrees in a
>>> Lat/Long location in 6.4.
>>do you mean 6.3?
> No, I meant 6.4, but checking 6.3.1.svn, 'dist' units are decimal
> degrees as well.

no, in 6.4 you get distance in meters not decimal degrees. Just
computation is too slow.

> >From r29568 [1] is distance (in LL locations) given in meters. Manual
>>pages in 6.3 should be fixed.
> Sorry, I'm a little confused; from the changeset, it appears that v.distance
> was being corrected to able to report in meters, as lat and lon are not
> equally scaled. So it seems that a bug in v.distance still exists, then?
> Shouldn't r29568 have fixed this?

Sorry, in which sense? In LL projection is used
Vect_line_geodesic_length() to calculate distances.


Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa *

More information about the grass-user mailing list