Thematic mapping

[Dylan Beaudette]

Looks like a great idea to me!

Nice pie charts.

Dylan


On Nov 23, 2005, at 9:59 PM, Bart van den Eijnden wrote:

> Search in the archive for pie chart. There was a nice example by Steve 
> Lime end of 2004. See below.
>
> Best regards,
> Bart
>
> Forwarded message:
>
> Hi all: I was updating mapgd.c today to make use of GD functions that
> appeared in GD 2.0.x. I made a small modification to the marker drawing
> code for ELLIPSE symbols, specifically circles. Now if you specify a
> style angle it is interpreted as a "pie slice". You can do things like:
>
>   http://maps.dnr.state.mn.us/testing/charts/test.gif
>   http://maps.dnr.state.mn.us/testing/charts/test.map
>
> Since you can load an angle from an attribute (via ANGLEITEM) you can
> build simple pie charts pretty easy. Only problem is it's hard to do
> more than 2 colors, and the origin is always 0.
>
> Assuming folks are ok with the modification (it's only 5 lines of code)
> what about adding a STARTANGLE parameter? We could probably do some 
> auto
> computation of starting angles between styles so that multiple element
> charts would be possible/easy to construct.
>
> Steve
>
> Bart van den Eijnden
> Syncera IT Solutions
> Postbus 270
> 2600 AG  DELFT
>
> tel.nr.: 015-7512436
> email: BEN at Syncera-ITSolutions.nl
>
>>>> Paul james <pauljame at GMAIL.COM> 11/23/2005 7:43 PM >>>
> Hi all... Is it posible to make Thematic mapping  with mapserver? I 
> need
> associante some graph with my map ( Each state with a pizza diagram )..
> How can I do that?
>
> ty
>
>
--
Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis
530.754.7341