function help_projection(self)%    SeaGrid offers "Mercator" (default) and "Stereographic"% conformal mapings, of which the Mercator projection looks% the best here.  The SeaGrid "Setup" dialog allows the% projection, center-of-projection, and geographic bounds to% be set.  These default to the "Mercator" projection, centered% at (longitude, latitude, rotation-angle) = (0, 0, 0) degrees,% with no fixed bounds.%    The "Transverse Mercator" projection can be computed% from the "Mercator" mapping, using a center-of-projection% of (LON, 0, 90), where LON is the desired central-longitude,% in degrees.%    The "Lambert Equal Area" projection is not conformal,% but is useful for comparing the relative areas of adjacent% grid cells. % Copyright (C) 1999 Dr. Charles R. Denham, ZYDECO.%  All Rights Reserved.%   Disclosure without explicit written consent from the%    copyright owner does not constitute publication. % Version of 28-Dec-1999 11:00:24.% Updated    28-Dec-1999 17:30:29.helpdlg(help(mfilename), 'SeaGrid Projection')