Creating a Polar Stereonet 1. Small circles can be constructed using degree markings along the main meridian and equator as guides. In the absence of a stereonet, radii of small circles can be constructed using the definition of the stereographic projection.
Great circles are simply radial lines.
Construct them using the degrees on the primitive circle, or with a protractor. A polar stereonet would almost never be used by itself. It would be used in conjunction with a regular stereonet of the same diameter for rapid plotting of lines or poles. Once plotted, the data overlay would be transferred to a regular stereonet for analysis. A polar stereonet is good for plotting large quantities of trend and plunge data directly.