GIS6005: Proportional & Bivariate
This week's lab had us exploring the uses and applications of Proportional and Bivariate maps in GIS. The proportional map, as shown above, is useful when you want to show how much of something exists in different places, not just where it exists. To create this proportional map, we had to use negative values which is not something the program likes to work with when creating classes for the proportional symbols. In order to generate two different symbols as shown, two of the same features were needed and the negative values turned into positive ones. This process was easy enough, but the legend was a different story, as two legends would have been cumbersome in the final map design. We had to add some "false" values into the negative values (job loss) feature attribute table so that when the class breaks were made, the accompanying symbol size for both features would have the same breaks. After the sizing issue was corrected, creating the ...
