[OpenLayers-Users] question about overlays

[bradleyspencer]

Adam,

Have you thought about creating the thematic overlays interactively using
SLDs?

See http://www.cubewerx.com.au/DemoDrapes.html

Cheers,

Brad Spencer
General Manager
CubeWerx Australia Pty Ltd
ABN: 37 115 163 285
Mob: +61 (0)404 841 131
Tel/Fax: +61 (0)2 9481 7024
mailto:brad at cubewerx.com.au
http://www.cubewerx.com.au

-----Original Message-----
From: Adam Eskreis [mailto:aeskreis at gmail.com]
Sent: Wednesday, 11 April 2007 10:24 AM
To: users at openlayers.org
Subject: [OpenLayers-Users] question about overlays

I am currently constructing a map with many thematic layers.  For those that
don't know, a thematic layer is a layer which color codes certain polygons
based on a certain field, such as population density or something like that.
I want these thematic layers to be able to be turned on and off.  I have
each thematic layer set up as a seperate group in the mapfile, and i set up
each one as a seperate overlay in openlayers.  However, my problem is now i
have around 40 overlays on my OpenLayers map.  Is this too many?  It is
taking a long time to load the map now.  So my question, is having a lot of
overlays bad practice?  If so, how can i cut down on overlays, but still be
able to have each thematic layer be able to be shown on demand by the user?
Thanks.

-Adam
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