Hello, Thank you for your answer.
I imported the shape into postgis and updated it's geometry with the st_reverse before to re-export as shape. I didn't know that such a function exists. Now it looks good so I guess that I'm right thinking that the markers symbolizer is using the way the geometry is encoded to draw the blue arrow on road element. Thank you again Nicolas. Holger Schöner wrote: > > Hi Nicolas, > > I don't know the marker symbolizer, but: > > On Tue, 6 Oct 2009, Nicolas Gillet wrote: >> What are my options to render direction of trafic flow if my only way to >> know it is another field of the record ? > > If your data is in a PostGIS db (maybe also possible with some library > knowing Simple Features?), you can use the SQL query to reverse a way > using > ST_Reverse on the fly, depending on the value of the other column. > > Holger > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > > -- View this message in context: http://www.nabble.com/MarkersSymbolizer-in-the-wrong-direction-tp25769059p25771055.html Sent from the Mapnik - Users mailing list archive at Nabble.com. _______________________________________________ Mapnik-users mailing list [email protected] https://lists.berlios.de/mailman/listinfo/mapnik-users

