Credits

The creators/maintainers of tcl/tk, and its libraries.

Evolane for making a very complete port of tcl/tk to pocketpc's/ smartphones


Some material was taken from other programs. Most of the is on the tcl'ers wiki.
Richard Suchenwirth. Various parts
Keith Vetter  http://wiki.tcl.tk/11109 (transverse mercator and UTM calculations)
Ulis http://wiki.tcl.tk/9223 (scrolledframe.tcl)
Eric Kemp-Benedict http://wiki.tcl.tk/14902 (editing in tktable)
Németh József Gábor http://wiki.tcl.tk/11924 (enhanced image scaling)
Various other people.

Map projection formulae:
http://www.posc.org/Epicentre.2_2/DataModel/ExamplesofUsage/eu_cs34.html

Sun and Moon position formulae:
http://www.stargazing.net/kepler/index.html (sun and moon positions)