projections.m

Set of tools to perform transformations between projection, ellipsoidal and cartesian coordinates in

% PROJECTIONS.MAT
%
% Mat-File containing isogonic projections as used in geodesy to map spatial data in 2D.
%
% This mat-File contains cell arrays named by the projection in lower case letters.
% The projection cell array fields are
%                   m0  the scaling factor of the central meridian
%               ellips  the underlying ellipsoid as string in lower case letters
%                       The ellipsoids are stored in the mat-File "Ellipsoids.mat" also as
%                       cell-arrays named by the ellipsoid, e.g. 'bessel1841' or 'wgs84'.
%                       See "help Ellipsoids" for further details.
%               ruleEll the rule to translate the zone identifier ID for the projection zone to
%                       longitude
%                       The zone identifier is taken from the abscissa coordinate of the projection 
%                       and is transformed into a addition on the calculated longitude-per-zone.
%                       For example, for GK-projection the rule is "+ID*3" due to 3