Dear Michal, Thanks for your answer. I understand a little bit more the way of think of Mapnik. A z-Index will be helpful for the mapfile. I hope to it will be integrate in a future release.
Also it will be geat to have some parameters like border-color and bordor-size. Actually I have to define the layers twice, one for the background with an higher stroke-width and one for the real color. Regards Arnaud Michal Migurski-3 wrote: > > My experience has been that Mapnik's drawing looks a bit like this: > > for each layer in layers: > for each style in layer: > for each geometry in layer data source: > for each rule in style: > for each symbolizer in rule: > draw the geometry using the > symbolizer. > > So your first example runs through the geometry set twice, first > drawing the less important roads and then drawing the more important > roads on top. Your second example runs through the geometry set once, > drawing less important roads and more important roads as they come out > of the data source. If your datasource supports it, you can use an > ORDER BY clause to choose which roads to draw first and which to draw > second. > > Incidentally these kinds of nuances are something that I'm almost > totally glossing over in Cascadenik, I just don't know how to express > them, though I have gotten requests for something like CSS z-index. > > -mike. > > On May 6, 2009, at 9:51 PM, arno974 wrote: > >> >> Hi all, >> >> I defined differents style for my roads data. This style are used to >> classify the importance of the roads. So I made my style like this : >> >> <Style name="secondaryRoads"> >> <Rule> >> <Filter>[roads] = 'Less-important'</Filter> >> ... >> </Rule> >> </Style> >> >> <Style name="primaryRoads-text"> >> <Rule> >> <Filter>[roads] = 'More-important'</Filter> >> ... >> </Rule> >> </Style> >> >> With this style everythings works fine. >> >> But if i trie to do it like below, my roads 'less-important' is >> always above >> the 'important roads so I wonder how Mapnik draw the tiles inside a >> style? >> >> <Style name="secondaryRoads"> >> <Rule> >> <Filter>[roads] = 'Less-important'</Filter> >> ... >> </Rule> >> <Rule> >> <Filter>[roads] = 'More-important'</Filter> >> ... >> </Rule> >> </Style> >> >> Thanks for your answer. >> >> Best regards >> >> >> -- >> View this message in context: >> http://www.nabble.com/In-which-order-Mapnik-draw-the-tiles-inside-a-style-tp23420181p23420181.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 >> > > ---------------------------------------------------------------- > michal migurski- [email protected] > 415.558.1610 > > > > _______________________________________________ > Mapnik-users mailing list > [email protected] > https://lists.berlios.de/mailman/listinfo/mapnik-users > > -- View this message in context: http://www.nabble.com/In-which-order-Mapnik-draw-the-tiles-inside-a-style-tp23420181p23477377.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
