Abstract
AbstractThe traditional methods of calculating geodesics by means of a chord-arc system use an average radius of curvature, based either on a general average for the region concerned, an average at the midlatitude, or an average using the values at the endpoints. Both the latter two methods are decidedly superior to the first, but are not the best that could be done, for when the geodesic is such that its midpoint occurs where it crosses the meridian due east-west, it is seen that both the above averages are inferior to one based on one at the true midpoint. We thus seek a better method.
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