Shaded maps by Peter H. Dana, The Geographers Craft Project. Department of Geography, The University of Texas at Austin. Neither conformal nor equal area. A perspective projection from the center of the globe onto a tangent plane at the central point of the projection. Less than one hemisphere can be viewed from a given origin.
Scale is true only where the central parallel and meridian cross.
All great circles are shown as straight lines. Scale is tue only where the central parallel and meridian cross like the Gnomonic or along a circle concentric around the center of the projection. All great and small circles as shown as circular arcs or straight lines. Used in the polar aspect for topographic maps of polar regions. Recommended for conformal mapping of regions that are circular in shape.