[postgis-users] flip lines

Sandro Santilli strk at keybit.net
Tue Nov 6 09:21:02 PST 2012

On Tue, Nov 06, 2012 at 05:11:48PM +0000, Pedro Costa wrote:
> Thanks Sandro...
> It is possible determine the current directions before use st_reverse?

Try ST_Azimuth.

> I want all lines with same direction

"Segments", hopefully. Lines may go zig-zag...
ST_Azimuth takes two points, so it's up to you what to feed it from
your lines.


More information about the postgis-users mailing list