EXAMPLE 12 Annotated Map Borders
Purpose: This example demonstrates how to draw darker state outlines on a U.S. county map. The technique can be easily adapted to any map that has geographical boundaries at a lower level in which you want to also show groupings at a higher level. (This technique was adapted from SAS Technical Support’s example number 24904.)
There is no built-in way to represent two different levels of map borders in SAS/GRAPH. Therefore, you have to create a custom map using the Annotate facility. In a nutshell, you create a normal county map, and then annotate the state outline on top of it using a line that is darker or thicker or both.
You might be tempted to try combining maps.uscounty and maps.us, but those two do ...