[GRASS-user] how to get instantaneous heading of a line at a pt?

Markus Neteler neteler at osgeo.org
Tue Feb 17 03:00:54 EST 2009


On Tue, Feb 17, 2009 at 5:05 AM, Hamish <hamish_b at yahoo.com> wrote:
> Hi,
>
> I have used v.to.points to create a series of points that fall along a
> line. Now I want to upload to a DB column in the points map the
> instantaneous heading of the original line at that sample point.

This functionality might be added to v.to.db - perhaps using
Vect_get_node_line_angle():
http://download.osgeo.org/grass/grass6_progman/level__two_8c.html#a16


Markus


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