Thanks Brent, Happy Christmas / New Year to you as well!
On 23/12/2010, at 2:07 PM, pcr...@pcreso.com wrote: > ST_Translate() is the simplest, but if your lines are horizontal you may want > a Y shift as well? > > http://postgis.refractions.net/documentation/manual-svn/ST_Translate.html Lines are roads, so they go every which way. > Having done this, I suggest you also use ST_reverse() to reflect the > direction is now going the other way (unless it already is :-) > http://postgis.refractions.net/documentation/manual-svn/ST_Reverse.html > > For more complex shifting of features, probably overkill in your case, see > http://postgis.refractions.net/documentation/manual-svn/ST_Affine.html This might be what I am after, but I was thinking of somehow translating each segment parallel to it's current alignment and then rejoining with a nice smooth curve... kind of like a 1-sided buffer. cheers Ben > --- On Thu, 12/23/10, Ben Madin <li...@remoteinformation.com.au> wrote: > > From: Ben Madin <li...@remoteinformation.com.au> > Subject: [postgis-users] Shifting linestrings left > To: "PostGIS Users Discussion" <postgis-users@postgis.refractions.net> > Date: Thursday, December 23, 2010, 3:13 PM > > G'day all, > > I have a problem where I am trying to show the route of livestock movements, > but I am loosing information when the travel along the same road in different > directions (ie in some cases they travel from a saleyard to a feedlot, then > back to the saleyard after a period). The roads they travel along are single > linestrings. > > Is there a way to 'shift' the linestring to the left - after all, that would > be sensible side of the road to drive on... > > cheers > > Ben > > > _______________________________________________ > postgis-users mailing list > postgis-users@postgis.refractions.net > http://postgis.refractions.net/mailman/listinfo/postgis-users _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
