PT  - JOURNAL ARTICLE
AU  - Klimánek, Martin
TI  - Accuracy of digital terrain model and its application in forestry
DP  - 2014 Nov 26
TA  - Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
PG  - 137--144
VI  - 55
IP  - 4
AID - 10.11118/actaun200755040137
IS  - 12118516
AB  - Digital terrain model (DTM) is considered as an important geospatial data layer. At the present in the Czech Republic, digital contour data sources are often used for constructing regular raster DTM; the initial process requires interpolation between the points in order to estimate values in a regular grid pattern. The commonly used data sources are: the Primary Geographic Data Base (ZABAGED), the Digital Territory Model (DMÚ25) and eventually the Regional Plans of Forest Development (OPRL). In this paper, some constructions of DTM based on the above mentioned data were tested using several software products. Algorithm parameters can be optimized in several ways; in this sense the most useful operations proved comparing the first and second derivative of DTM and its real appearance in terrain and using cross-validation procedure or terrain data measurements to compute and minimize the root mean square error values (RMSE). The Forest Training Enterprise "Masaryk Forest" was the area for the experimental optimization of DTM.