Like the classed choropleth map, the unclassed choropleth map displays a variable of some type through the use of color over a geographic location. The difference between the two is that the unclassed does not have colors that are dependent on one another. For instance, comparing African American and Asian populations does not imply that they depend on one another for the purposes of survey; they are two different types of people with attributes to the variable that cannot be displayed under a single range. For the map shown here, rock types are broken down by color and are unrelated to each other with the exception of location in the Siskiyou National Forest. Jurassic sedimentary rocks are the most common throuhg the center of the map while a mixture of many types can be seen along the eastern side and western sides of the map.
No comments:
Post a Comment