do you need to index your angles? From time to time you may need to divide a circle into specific segments or index a lathe spindle. Here is a free download of a degree wheel that can give you the accuracy you want.
http://www.tavia.com/free_degree_wheel.htmlAlthough the wheel is for mechanics to work on valve timing, the degree marks are the same you would normally use, they just go from 0 to 180 clockwise and counter clockwise. Enlarging the download can give you any size that works for your situation.