Time for action – classifying roads

The roads data set provided by Natural Earth has some attributes that can be used to classify roads. You may use the CLASS field for thematic mapping, assigning a different symbol to each class:

1. Take the Roads.xml file, make a copy to RoadsThematic.xml, and then edit the new file in your text editor.

2. Go to line 9 and replace the text inside the Name element with the following code snippet:

       <Name>RoadsThematic</Name>

3. Go to line 11 and replace the text inside the Title element with the following code snippet:

       <Title>Geoserver Beginners Guide: Roads thematic map</Title>

4. The CLASS field contains six different values: Interstate, Federal, State, Other, Closed, and U/C. We will re-use the symbol for the first value, Interstate. You need to add a filter inside the rule, so that the symbol will be applied only to features with the Interstate value in the CLASS field. Add a Name element inside the Rule element and set it to Interstate...