Compass Rose Map Stencil v1.1

Some maps don't seem to have enough, or sometimes any compass rose, maybe they only have cardinal directions or a grid but no magnetic declination information at all, now you can easily add as many compass roses as you like, accurately with this stencil and a Sharpie fine tip pen. This is a big deal if you are navigating by map and compass or using landmarks on a map to try to get yourself or a radio contact un-lost or reoriented.

This was inspired by me seeing an American evasion chart, a military map for downed airmen or cut off soldiers which has not only several forms of navigation and several compass roses on each side but also local and general survival information, how-tos for carried survival gear, and first aid instructions; even current drift rates at sea.

This is a .scad file to compile a customizeable compass rose stencil in OpenSCAD for 0.4-0.5mm tip pen, compiling options for extending cardinal lines and half protractor for use with parallel rules(then turn it arou