EXAMPLE 24 Plotting Coverage Areas on a Map
Purpose: Create circles with a radius of a given size, and place them at the desired latitude and longitude coordinates on a map.
Jenni, one of my co-workers who volunteers with the public radio stations of North Carolina, suggested this idea for a map. She thought it would be neat to see all the North Carolina public radio stations plotted on a map, with circles showing their estimated broadcast areas. I agreed that it was an excellent idea for a custom map.
This example involves two bits of custom programming:
Creating circles where the radius represents a geographical distance.
Placing those circles on a map at specific latitude and longitude coordinates.
I first create a county map for the ...