A General Surface Representation Module Designed for Geodesy
- 1 June 1980
- report
- Published by Defense Technical Information Center (DTIC)
Abstract
Technological developments during the last decade have provided geodesists with the capability of obtaining enormous amounts of data on and outside the surface of the earth. In order to understand the general behavior of the data, a graphical representation of the data is useful. This type of representation can be obtained by using GSPP, Geodetic Science Plotting Package, a set of FORTRAN IV subroutines. This report describes the various algorithms of GSPP used to predict, by a number of different methods, a bicubic spline surface from irregularly distributed data and to produce profiles, contour maps and/or 3-D views of the surface, its first or second derivatives. In addition, complete labelling capabilities are included. Unique features of GSPP are that regions in which contours are to be included/excluded can be defined and that contour maps can be produced according to a user defined projection.Keywords
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