Abstract
Digital Model of Relief (DMR) is a data set of space-structural model of the continental part of the Earth surface, presented in a digital form. It is a subset of spatial and geoinformation systems and presents one of the models of Digital Terrain Model (DTM) which includes different digital models of the Earth crust and the atmosphere. DMR is used for determining, studying (researching) and estimating features of the Earth surface for both military and civilian purposes. It has a multiple application in geodesy amongst which determination of geoid; physical 'reality' of gravity Earth field and determination of the reference surface for orthometric heights-altitudes are of the greatest significance. Orthometric heights are mainly used for applying GPS as well as the common Geocentric Earth Ellipsoid (WGS-84). By applying DMR and Fast Fourier Transform Technique (FFTT) it is a possible to determine geoid ten times more efficient with regard to classical approaches of numerical integration, with possibility of using a large group of data that have broad application. Fundamental terms of DMR, its composition, analysis and the possibility of its application are treated in the paper.
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