Here are some Help videos that show how to use the Gridpoint Atlas software. You should watch all three videos.
The first video shows the Calculation side of the software where you can view and calculate all of the harmonic values outlined in Bruce Cathie’s books.
The Calculation Window in Gridpoint Atlas
The second video is on the Map side of the software and shows how to plot the World Grid.
The Map Window in Gridpoint Atlas
The third video shows how I use the software to plot the World Grid in Gridpoint Atlas, then view in Google Earth.