Shapefile classification by attribute

[Matthew Perry]

Eric,

 Mapserver can indeed create choroplethic maps. You'll want to
research the CLASS and EXPRESSION mapfile parameters.

There is a good tutorial online at:
http://biometry.gis.umn.edu/tutorial/example1-3.html

In your case, you'll most likely want to create multiple layers for
each attribute of interest.
Each layer would be comprised of multiple classes.
Each class would be defined by an expression (eg ACRES_2002 < 10 ) and a style.

Hope this helps.. and welcome to Mapserver!

- matt


On 11/15/06, D. Eric Keefauver <eric.keefauver at mtu.edu> wrote:
> Hello,
>
> I have been an ArcIMS user for quite sometime and have been "playing" with
> Mapserver (the ITASCA demo)in rendering simple shapefiles. My question is
> this:  I have a county shapefile (83 counties) that has a few attributes
> in the file e.g., -- Shape -Name - Acres_2002- Acres_2003- Cost_2002 -
> Cost_2003- etc.
>
> I would like to be able to display an attribute on user selection. For
> instance, if the user selects Acres_2002 the map would display the
> attribute field Acres_2002 based on some sort of classification with the
> end result being a chloropleth rendering of the attribute field
> Acres_2002. Can this be done with straight Mapserver functionality? I am
> using MS4W v1.4.0.
>
> I thank you in advance,
>
> Eric
>
> Eric Keefauver
> Research Scientist
> Michigan Tech Research Institute (MTRI)
> 3520 Green Court, Suite 300
> Ann Arbor, MI 48105-1579
> Phone: 734-302-4724
> Fax: 734-302-4991
> eric.keefauver at mtu.edu
> http://www.mtri.org
>


-- 
Matthew T. Perry
GIS Analyst / Software Engineer
National Center for Ecological Analysis and Synthesis (NCEAS)
work: perry at nceas.ucsb.edu
web: http://www.perrygeo.net