[OpenLayers-Users] Proportional Symbol Mapping

[Bjorn Sandvik]

Hi David,

I will consider thematic mapping with WMS at a later stage.

"European Interactive Atlas Explorer" is a good example:
http://karlinapp.ethz.ch/wms_client/

The disadvantage is lack of interactivity on the client.

Bjorn

http://blog.thematicmapping.org



David Fawcett wrote:
> I can think of another option, but it is a fairly big change of course. 
>
> Instead of sending RSS to OpenLayers and building the vector features, 
> you could use MapServer to create a transparent WMS layer with your 
> features in it.  That way, you could use LAYER SYMBOLSCALE to scale 
> your symbols. 
>
> David.
>
> On Fri, Apr 4, 2008 at 5:57 AM, Christopher Schmidt 
> <crschmidt at metacarta.com <mailto:crschmidt at metacarta.com>> wrote:
>
>     On Fri, Apr 04, 2008 at 10:48:09AM +0200, Eric Lemoine wrote:
>     > On Thu, Apr 3, 2008 at 11:05 PM, Bjorn Sandvik
>     <B.Sandvik at sms.ed.ac.uk <mailto:B.Sandvik at sms.ed.ac.uk>> wrote:
>     > >  My question: Is there a way to keep the relative size of the
>     symbols
>     > >  when the users zoom in/out?
>     >
>     > AFAICT there's no way to style features based on the current
>     zoom level.
>
>     I'm pretty sure that the StyleMap/Style/Rule system is designed
>     exactly
>     for that, but I have no idea how it's supposed to work.
>
>     I would say "look at http://trac.openlayers.org/wiki/Styles", but
>     I see
>     that it's using Rules for styling, which I think was recently decided
>     would be unsupported in OpenLayers 2.6, so I don't know what you're
>     actually supposed to do.
>
>     Andreas? Tim?
>
>     Regards,
>     --
>     Christopher Schmidt
>     MetaCarta
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