[MAPSERVER-USERS] Displaying population density with Mapserver

[Burgholzer,Robert]

I don't know if there is any way to select the STYLE based on the SCALE
(which sounds like what you want to do), but you may consider
constructing a few separate copies of your layer, each with a different
point size, and restricted to display over a certain range of map
scales, using MINSCALE and MAXSCALE settings on each of the layers.

 

This would achieve the desired affect, I think,

 

Robert W. Burgholzer

Surface Water Modeler

Office of Water Supply and Planning

Virginia Department of Environmental Quality

rwburgholzer at deq.virginia.gov

804-698-4405

Open Source Modeling Tools:

http://sourceforge.net/projects/npsource/

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of
Pierre-Benoit Besse
Sent: Tuesday, May 27, 2008 11:07 AM
To: Ritesh Ambastha
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [MAPSERVER-USERS] Displaying population density with
Mapserver

 

Yes, but I need them to adapt for different extents.

For example, When I zoom out enough to see the world, I need them 1
pixel wide (it's ugly otherwise), but when I zoom in I will need then 2
or 5 or even 30 pixels wide to cover all space.

2008/5/27 Ritesh Ambastha <group.ritesh at gmail.com>:


Dear Faldor,

<snip>What I need is to have the points grow to cover all space
available
when I zoom in.</snip>

Do you mean that the size of points should grow? It can be done easily
by
setting proper SIZE in the STYLE tag.


Regards,
Ambastha




Faldor wrote:
>
> Hi,
>
> Sorry for my first empty message.
>
> My problem is, I need to display population density with Mapserver.
The
> data comes from GPWv3 and has a resolution of 15'. I converted it to a
> POINT Shapefile using ogr2ogr.
>
> At first when I display it on a world map it shows nicely. But when I
zoom
> in it begins to show separated points for each value in the shapefile.
> What I need is to have the points grow to cover all space available
when I
> zoom in.
>
> Is there any mean to do it with Mapserver ? I did not find it in the
> mapfile reference.
>
> I don't know if I explained it well (I'm not english speaking). If you
do
> not understand something, please ask.
>
> Cordialy,
>
> Faldor
>
>
>

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