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Code Listing by Peter Wasmeier

Code 1-4 of 4   






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

Included are
proj2ell - projection to ellipsoidal
ell2cart - ellipsoidal to global cartesian
d3trafo - datum transformation between global cartesian coordinate systems
cart2ell - global cartesian to ellipsoidal
ell2proj - ellipsoidal to projection
helmert3d - calculate the d3trafo...



When interpolating on a given data set, convhull is used to set the boundaries of the interpolation area. Because convhull only minimizes the outline length, there might be interpolation lines which are unwanted (see figure).

hullfit...



The function creates a modal dialog consisting of two listboxes. Items can be chosen from one box and transferred or copied to the other. The order of picking is obtained (normal listbox only results in sorted order).

Adoption of the...



A set of functions to calculate coordinate transformations between different reference ellipsoids and different projections, including tools on:

- transformation from cartesian to geographic coordinates and back
- transformation...