Once it is installed you will also need the color map from ASSH 2E.
Start inkscape, and then do a File->Open of the pdf of the map.
For the PDF import options I use the Poppler one.
It's gonna take some time for it to load.
Once it has loaded. You will want to import the ley line file. File->Import
You will need to center it on Mount Vhuurmithadon. The NW tip of it should be around the obelisk in Sharath as well.
Now you have one of my ideas for ley lines.
I also have this idea of demi-obelisks that are smaller and are at the intersection of the ley lines and the lines of latitude on the map. They might has be at other points on the ley lines as well.