[mapserver-users] how to create symbol on the START and END of aline

[Juan Carlos Monestel]

Hi Ludwig
Today I do this, I create a layer with the line and then create another layer with the points (start and end) using SQL. 
But I would do this without need to create 2 layers using the same SQL causing decrease the rendering time.


Any other Idea?


Thx
Juan

-----Original Message-----
From: Ludwig Kniprath [mailto:ludwig at kni-online.de]
Sent: Tue 3/29/2011 4:57 PM
To: mapserver-users at lists.osgeo.org
Cc: mapserver-users-request at lists.osgeo.org; Juan Carlos Monestel
Subject: Re: [mapserver-users] how to create symbol on the START and END of aline
 
Hi,
perhaps a workaround for your problem:
If you use database-driven-layers, f. e. postgis, you can create two 
spatial queries that return the start- end endpoints of your lines 
(postgis-functions ST_StartPoint and ST_EndPoint), each of them for a 
new point-layer for start and end-symbolization.

hth
Ludwig



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