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Copan: Coordinate Geometry (COGO) for Surveying

This is a bit out of hydrology, hydraulics, and water quality, but a beneficial software application for those working with land surveying data - a common task associated with HHWQ. Anyway, I like it. From the author...

"Copan from Underhill Geomatics Ltd is a free tool for computing and managing plane land survey coordinates. It calculates coordinate geometry (COGO), processes field survey data, computes and adjusts map traverses, performs map checks, calculates areas and perimeters, transforms coordinates, and imports/exports Ascii files. It supports quadrant and whole-circle bearings, and gons as well as degrees-minutes-seconds. It runs on Windows and two mobile platforms, PalmOS and PocketPC. The Windows version also supports south- as well as north-based bearings. The mobile versions also calculate curves and have GPS positioning and navigation functions."