you can have a look at how bridges are done on the wiki page that accompanies the map on the mapserver.org frontpage (there's a bridge right south of the sydney exhibition center when you zoom in to the closest level, not sure why some don't show up on motorways). That, coupled with start/end geotransform should get quite close to what you want.
regards, thomas www.camptocamp.com +33 4 79 26 57 97 On Fri, Jun 12, 2009 at 06:34, David Nugent<dav...@datalinktech.com.au> wrote: > Greetings all, > > On Thu, 11 Jun 2009 16:37:11 +1000, I wrote: >> >> One last problem I'm scratching my head on. >> >> I want to highlight bridges by using a thick border on each side of the >> road (and if possible an angular section at each end of the border as often >> seen in traditional road maps). Using an outline won't work for this as >> outlines close the end points of the line segment with a border and I would >> prefer them to blend directly with the road to which they belong. I'm >> thinking a symbol would be needed but not sure how to approach it. >> >> Like (view this with a fixed width font): >> >> ____\____________________________/__ >> ____ ____________________________ __ >> / \ >> >> (imagine lines joining \/ being thick) >> >> How to achieve such a border? > > > Following up on my own post again... > > SYMBOL does not appear to be well suited (unless I'm missing something) but > I've come close with GEOMTRANSFORM, however only at the start and end of a > line segment using what are essentially reversed arrowheads. > > I read the RFC in the mapserver 5.4 documentation and it talks about plans > to extend functionality of GEOMTRANSFORM (which it incorrectly refers to as > GEOTRANSFORM and GEOMETRYTRANSFORM, incidentally), and I *think* either the > "distance" or "buffer" might achieve most of what I need with ANGLE AUTO - > to draw a parallel line segment. However neither appears to be implemented > yet. > > > Regards, > David > _______________________________________________ > mapserver-users mailing list > mapserver-users@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/mapserver-users > _______________________________________________ mapserver-users mailing list mapserver-users@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/mapserver-users
