Thanks for all of the responses -- this helps quite a bit. -----Original Message----- From: UMN MapServer Users List [mailto:[EMAIL PROTECTED] On Behalf Of Stephen Woodbridge Sent: Sunday, October 29, 2006 7:16 PM To: [email protected] Subject: Re: [UMN_MAPSERVER-USERS] Shading Polygons and removing internal boundaries from shapefiles
Thematic mapping is best done using postgis. You can do multiple tables joins and thematic rendering very easily and efficiently. You can do some basic stuff with ogr, but I would strongly recommend that you look at postgis. The nice thing about mapserver is that you only need to load just the polygons and the attributes needed for the thematic mapping and all the rest of the data can stay in shapefiles. -Steve Ravi wrote: > Hi David, > > I am not original poster but I have similar requirement. > > I would like to shade polygons based on some data I have in a second > .dbf file (or data in a mysql server). > > Thanks for helping > Ravi > > > Fawcett, David wrote: >> Matt, >> >> For question #1, are you talking about the .dbf that is part of the >> shapefile, or a second .dbf that you would like to join to? >> For question #2, I would just suggest downloading the legislative >> district shapefiles from the MN Legislative GIS Office: >> http://www.gis.leg.mn/metadata/leg02.htm (there is a download link >> in the metadata) >> >> David. >> >> -----Original Message----- >> *From:* UMN MapServer Users List >> [mailto:[EMAIL PROTECTED] *On Behalf Of *Matt Pettis >> *Sent:* Monday, October 23, 2006 10:58 AM >> *To:* [email protected] >> *Subject:* [UMN_MAPSERVER-USERS] Shading Polygons and removing >> internal boundaries from shapefiles >> >> Hi, >> I just installed MapServer because I want to do some graphical >> shading of polygons that represent MN voting precints. I have two >> particular questions: >> 1. Is there an example mapfile or mapscript that helps me >> understand how to shade polygons on a scale based upon a numeric >> value in a .dbf file? >> 2. I want to graphically show Legislative districts, and I have >> voting precint shapefiles. How do I aggregate precints that belong >> to a legislative district and make that one polygon, erasing the >> lines that would be internal to this aggregated region?
