[mapserver-users] coloring map

[Ed McNierney]

Ludovic -
 
Yes, four colors is enough, but figuring how which color to use for each
state is tricky.  Are you sure you need to do this dynamically?  If you
only need to do it for the United States, I would just code some static
colors (find your favorite poster map of the US and copy their colors).
I would only consider a dynamic color-selection algorithm if you needed
to display many different polygon layers and color each one with no
touching edges.
 
The dynamic version is quite a bit more work, and we're not planning on
adding any new states any time soon....
 
    - Ed



Ed McNierney 
Chief Mapmaker 
TopoZone.com 
(978) 251-4242 


-----Original Message-----
From: Ludovic Tenant [mailto:Ludovic at siterra.com]
Sent: Wednesday, June 20, 2001 3:04 PM
To: mapserver-users at lists.gis.umn.edu
Subject: [mapserver-users] coloring map



Hi list, 

I would like to draw my US map so that contiguous states have different
colors (I think 4 different colors is enough...).

I was wondering if it was possible to do that with Mapserver/Mapscript
(for now I don't remember having seen a map with different colors for
polygons...). That would make my map much nicer for my web application.

So if anybody knows how to do that, I would welcome any examples. 
Thanks 

Ludovic.