[mapserver-users] R

[Thomas Bonfort]

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<davidn at 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
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