[postgis-users] flip lines
woodbri at swoodbridge.com
Tue Nov 6 09:21:14 PST 2012
On 11/6/2012 12:11 PM, Pedro Costa wrote:
> Thanks Sandro...
> It is possible determine the current directions before use st_reverse?
How do you define direction?
by compass? you can use st_azimith
do you lines have multiple points beyond the 2 ends? do you care about
these when determining directions? or only the end points?
Not a trivial question without additional information.
> I want all lines with same direction
> Em 06-11-2012 16:37, Sandro Santilli escreveu:
>> On Tue, Nov 06, 2012 at 03:52:44PM +0000, Pedro Costa wrote:
>>> Anybody know hot to flip the direction of lines?
>>> I'm trying to do this with swap (from qgis) but don't work....
>>> How I do that with SQL?
>> http://www.cartodb.com - Map, analyze and build applications with
>> your data
>> ~~ http://strk.keybit.net
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