Here are two .psd files which each contain a set of 32 radiating lines as a smart object so that you don't have to noodle around in a vector program to make compass lines for your map.
The images are large, but not huge. The thin version has 1px width lines and the thick version has 2px wide lines. Use these for whatever you want and enjoy, just post here if you find them useful.
Attachment 42760Attachment 42761