if you're using postgis, you can use a unique key from your table (i.e. gid) if you have a shapefile, you'll have to find an or a combination of attributes in the dbf that's unique to identify that particular feature.
-- thomas On Tue, Jan 19, 2010 at 11:59, Oliver Christen < [email protected]> wrote: > it makes sens, but how do I do that ? > do line segment get automaticaly an id ? > or how to get (or set) the id of the line segment? > > ----- Original Message ----- > *From:* thomas bonfort <[email protected]> > *To:* Oliver Christen <[email protected]> > *Cc:* [email protected] > *Sent:* Tuesday, January 19, 2010 10:50 AM > *Subject:* Re: [mapserver-users] symbol at start and end of polyline ? > > well, if you want only one line segment to have start markers, you must > tell mapserver which segment that is. > > On Tue, Jan 19, 2010 at 10:48, Oliver Christen < > [email protected]> wrote: > >> thx Thomas, but im not sure I understand what you are telling me here. >> do line segments have id ? >> >> ----- Original Message ----- >> *From:* thomas bonfort <[email protected]> >> *To:* Oliver Christen <[email protected]> >> *Cc:* [email protected] >> *Sent:* Tuesday, January 19, 2010 10:30 AM >> *Subject:* Re: [mapserver-users] symbol at start and end of polyline ? >> >> hi, >> >> class >> expression ([id]=321) >> style >> geomtransform end >> ... >> end >> end >> class >> style >> ... #all the others >> end >> end >> >> On Tue, Jan 19, 2010 at 10:14, Oliver Christen < >> [email protected]> wrote: >> >>> hello >>> >>> I would like to add a symbol at the start and end of a polyline. >>> >>> I tried using GEOMTRANSFORM with "start" and "end" in a style block in >>> the layer but sadely this will add a symbol to all start and end of every >>> vertex of the polyline, which is not the result wanted :/ >>> >>> is there any way to do that, beside creating a new point layer ? >>> >>> thanks in advance >>> Oliver >>> _______________________________________________ >>> mapserver-users mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/mapserver-users >>> >> >> >
_______________________________________________ mapserver-users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/mapserver-users
