Great circledom revisited : a simple, accurate method for determining great circle distances and routes on polar stereographic projections

by R. B. Murrow

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A discussion of polar stereographic projections oriented to the geographic interests of operation planners and analysts. Explanations and proofs of the method are given, together with useful graphs and working equations. An accompanying "Great Circledom Packet" contains an alignment board and set of 22 stable-plactic transparencies permitting direct visual determinations of approximate great circle distances and routes.

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