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weather: Implement the "great circle distance" algorithm for calculating distances between two latitude/longitude coordinate pairs, which should be more accurate than simply using Euclidean distance.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 09 Jan 2017 05:45:40 +0200
parents 30bb894cfb58
children 6c999a7ac6d9
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