Great Circledom Revisited: A Simple, Accurate Method for Determining Great Circle Distances and Routes on Polar Stereographic Projections

摘要

A discussion of polar stereographic projections. These maps are extensively used by operation planners, who have been following unnecessarily complex methods for determining great circle distances and routes on them. This Memorandum presents in detail a simple, accurate method for these determinations, a method well known to cartographers but apparently less familiar to planners. (Author)