Scientific journal
Scientific Review. Geographical Sciences

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PREPARING OF DIGITAL ELEVATION MODEL OF THE VOLGA FEDERAL DISTRICT TERRITORY FOR AUTOMATED ALLOCATION OF BASIN GEOSYSTEMS BOUNDARIES

Иванов М.А.
The paper presents a flow chart of the preparing of a digital elevation matrix of the Volga Federal District territory, based on freely available digital elevation models. Particular attention is paid to processing DEM Aster GDEM v.3, which contains a large number of artifacts and data gaps. During research developed and realized method for isolating DEM areas containing anomalous values using the system of object-oriented image analysis. To restore the data gaps used a modern method of multilevel approximation using basis spline, which, unlike conventional methods, is most suitable for processing large amounts of data. The result is a digital DEM with grid spacing of 100 m, based on data from Aster GDEM and SRTM, and prepared for automated allocation of basin geosystems boundaries.