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
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