[mapguide-users] Highway Shields with new cartographic stylingoptions

[Traian Stanev]

Hi Christy,

Mapguide does not treat each segment separately. It walks along each
polyline feature. If your roads are made up of many short polylines, it
is possible that you will see the behavior you describe.
Also, what is your <VertexControl> set to in the symbol definition?

One suggestion that *may* work -- make the bounds of the shield bigger
somehow -- for example by adding a transparent rectangle that is 3-4x
bigger than the actual shield. This will make the exclusion region
bigger and alleviate the problem regardless of underlying data.

Traian


-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org
[mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Christy
Nieman
Sent: Tuesday, September 11, 2007 10:46 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] Highway Shields with new cartographic
stylingoptions

Hello,

I'm working with data where one road can be represented by many 
segments.  I am trying to display highway shields along the roads in a 
consistent manner.  The problem I've run into is that in some places 
many shields are drawn and in others none are drawn.  By creating 
several scale ranges and adjusting the StartOffset and Repeat values at 
each scale, I've been able to create a map where the number of shields 
is usually acceptable, however I still have some areas with many and 
others with none.  I have DrawLast, CheckExclusionRegion and 
AddToExclusionRegion set to True in the LayerDefinition.

I believe the problem I am encountering is that MapGuide treats each 
segment individually, and therefore if the shield will fit in on the 
line with the specified StartOffset value it will be drawn, regardless 
of how close it is to a shield on nearby segments.  Can anyone confirm 
this?  Is anyone know there a way to specify a distance other than 
StartOffset and Repeat to create consistent spacing between the shields?


Thanks,
Christy
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