[udig-devel] Data Format, Text Delimited - another quick question

[John Oeffinger]

Adrian,

I followed this procedure by opening the usa_counties.dbf file used  
for the Walkthrough. Added a column named MBR,N,8,0. Entered a member  
count (number) for each county. Some counties had "0" members, most  
had at least "1" member. Saved the .dbf file.

Opened uDIG, added a new map, added a new layer using the  
usa_counties shape file. Selected the Style Editor for the layer.  
Selected MBR as the attribute. Set Classes to 5. Initially used  
Quantile but this changed to Custom when I changed the values. Left  
Normalize and Hide alone. Changed the values to: 0..1, 1..25,  
25..100, 100..250, 250..19000.

When the map is updated, there are several counties who show a color  
for 250+ which only have 1 or 0 members so the color representation  
is inaccurate. When I click on Information and click on the county,  
both the property "MBR" and Value "0" are accurately reflected.

Any thoughts as to what I might be doing wrong?

I am using a Mac Intel Powerbook. Thanks for your help...John

On Nov 30, 2006, at 11:41 AM, Adrian Custer wrote:

> John,
>
> As a workaround for now, you might be able to use OOcalc to edit the
> dBase file directly. I just tried and it works.
>
> Shapefiles come in sets with the same base name and different
> extensions. All of the attribute data in shapefiles reside in the .dbf
> file. OpenOffice.org's Calc spreadsheet can read and write .dbf files.
> So you can open up the .dbf file as well as your data file, sort them
> into a similar order, paste your data into the .dbf file and save that
> file. Then, when you open your shapefile into uDig, the data will
> appear.
>
> Next you're going to want to style your maps according to the
> attributes, aren't you? Well we just can't quite to that yet either  
> but
> are getting close.
>
> --adrian