Rich,
Lines with outlines are drawn either using a SYMBOL that is a pixmap
that is dragged along the line. Or you can use two or more STYLEs in a
single CLASS like:
STYLE
COLOR 255 0 0
WIDTH 5
END
STYLE
COLOR 0 0 255
WIDTH 3
END
Which would draw a 5 pixel wide red line and then overlay that with a 3
pixel wide blue line giving the appearance of blue line with a one pixel
outline in red.
-Steve W
rich.fromm wrote:
First of all, thank you for all of the prompt and helpful assistance I've
gotten so far. I hope I'm not asking too many questions here.
Now on to my current quandry: Is there any simple way of drawing lines with
outlines?
The mapfile docs:
http://mapserver.gis.umn.edu/docs/reference/mapfile/style
are indeed very clear in saying for OUTLINECOLOR that:
Line symbols do not support outline colors.
Although since there seem to be other examples of where those docs are
mapserver 4.x centric, I thought it might be worth asking with respect to
5.0.0. But I don't see any evidence of it in the 4.10.x to 5.0.x migration
guide:
http://trac.osgeo.org/mapserver/browser/tags/rel-5-0-0/mapserver/MIGRATION_GUIDE.TXT
And I tried just adding an OUTLINECOLOR along with the existing COLOR in the
STYLE section for a line, and that didn't work.
Currently the approach that I'm taking is as follows. For a line of width
of
m pixels plus an outline of n pixels, I first draw a line of width m+(2*n)
with the COLOR of the outline, and then I draw a line of width m with the
COLOR of the main line atop that. This was based on suggestions here:
http://mapserver.gis.umn.edu/docs/howto/cartosymbols/
While that works, it seems a little hacky, and I wonder if it has
performance
issues since ultimately each line has to be completely rendered twice. So I
was wondering if there was a better way.
