Time for action – enhancing thematic roads map

In the previous section, we styled a thematic roads map. It is a pretty map, but it lacks something to be ready for publication. As a user, you would expect roads be drawn on different scales according to their classification. SLD has elements to define a scale range where a rule must be applied; they are called MinScaleDenominator and MaxScaleDenominator. Let's use them!

1. Take the RoadsThematic.xml file, make a copy to RoadsThematicScale.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>RoadsThematicScale</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 with scale ranges</Title>

4. We want Interstate roads to appear at any scale, so we leave the first Rule unchanged. Federal roads will appear only at 1:10,000,000 scale...