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Contains implementations of Coordinate Reference Systems (CRS), conversion and transformation services.

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    package org.geotools.nature
  
  
    Algorithms related to the observations of natural phenomenons. Most algorithms in this package are
    derived from empirical measurements; their results are approximative. Algorithms include:
    
  • Sea water properties (density, sound velocity, fusion temperature, etc.) computed from salinity, temperature and pression using algorithms published by UNESCO.
  • Values relative to earth calendar, like tropical year length.
  • etc.

 

References

Alain Poisson, M.H. Gashoumi and Selim Morcos.
    Salinity and density of seawater: table for high salinities (42 to 50).
    Unesco technical papers in marine science #62 (1991).

Unesco
    International oceanographic tables, volume 4.
    Unesco technical papers in marine science #40 (1987).

Franck J. Millero.
    Solubility of oxygen in sea water in Progress on oceanographic tables and standards 1983-1986.
    Unesco technical papers in marine science #50 (1986) pp.13-14.

Unesco
    The international system of units (SI) in oceanography.
    Unesco technical papers in marine science #45 (1985).

N.P. Fofonoff and R.C. Millard Jr.
    Algorithms for computation of fundamental properties of seawater.
    Unesco technical papers in marine science #44 (1983).


Tropical year length is computed using formula by Laskar (1986). Synodic month length is computed using formula by Chapront-Touze and Chapront (1988). Those formulas was taken from the following adress:




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