EXPLOITATION OF THREE-DIMENSIONAL MODELS IN GRASSLAND ANALYSIS. CASE STUDY* PUBLISHEDMargareta MĂGUREANU1, Loredana COPĂCEAN1, Luminiţa COJOCARIU1 1Banat’s University of Agricultural Sciences and Veterinary Medicine”King Mihai I of Romania” from Timisoara firstname.lastname@example.org
The appearance and typology of the grasslands, in the hilly and mountainous areas, are in accordance with the characteristics of the relief (slope, exhibition), the climatic conditions and with the properties of the soils. In this context, the plants in the grassland habitats have undergone changes and have adapted to the subzones with particular conditions. The variability of the environmental conditions requires the detailed analysis of the grasslands by holistic methods, which should “combine” all the factors of the physical environment at any point on the investigated surface. The aim of the research was to extract relevant information in pratological studies, by processing three-dimensional models generated from altimetric models and topo-cadastral data. For the analysis of the grassland considered a case study, satellite images and topo-cadastral data were used. The processing and general mapping was done with ArcGIS 10.2.1 software (ArcMap and ArcScene) and Google Earth Pro. Essential data were considered: altimetric values, both point and in the form of continuous images (raster), slope of the terrain (length and slope), slope orientation; all these elements have a direct and indirect influence on the vegetation of the grassland. The research results show that the analyzed grassland from ATU Goruia, has an area of 296 ha, is arranged on two slopes on altitudinal levels, has different values of the slope depending on the terrain configuration and is demarcated by the forest line. The transversal profile, on an interval of 2.72 km, of the highest peak shows that at an altitude of 660 m a plateau is created, the minimum value being 394 m altitude on the slope with shaded exposures (average slope is 21.4% ) and 434 m altitude on the slope with sunny exposures (average slope is 19.0%). The analyzed grassland has three ridges, on one side of the slope dominates the exposure N, N-V and the other side of the slope is characterized by an exposure E and S-E. Biomass production and species diversity, as a specific expression of the respective ecotope, significantly reflect the relief character.
grasslands, three-dimensional models, geospatial data, spatial analysis
field crops and pastures