math/congen 1.7nb4 NetBSD

congen is a C++ library for generating the speeds, equilibrium arguments, and node factors of Darwin-style tidal constituents more or less as defined in SP 98:

Manual of Harmonic Analysis and Prediction of Tides. Special Publication No. 98, Revised (1940) Edition (reprinted 1958 with corrections; reprinted again 1994). United States Government Printing Office, 1994.

Additionally, libcongen provides limited support for approximating Doodson-style tidal constituents within the infrastructure of the former. The Doodson approach is discussed in the following publication:

Foreman, M.G.G., 1977. Manual for Tidal Heights Analysis and Prediction. Pacific Marine Science Report 77-10, Institute of Ocean Sciences, Patricia Bay, Sidney, B.C. (2004 revision).

The Congen header file is intended to be self-documenting with regards to use of the interface, assuming that one has access to SP 98 and a general understanding of the subject matter.