engleski

Application of a geographical information system to low-scale mapping of stratigraphic unit thickness a case study of basic geological map of Croatia

Basic Geological Map of Croatia is based on the chronostratigraphic classification. Each sheet consists of schematic geological column showing thickness of mapped units. Thicknesses of each stratigraphic unit were analysed and after that thickness values were stored in the attribute tables of relevant features in the GIS point feature dataset. Processing and presentation of the geospatial data were done using GIS software, utilising additional spatial and geostatistical software extension. Analysed data were interpolated by deterministic method – spline interpolation. The results were presented by a series of maps that show thickness of the stratigraphic units and their spatial distribution. Such graphical display clearly shows the areas with the highest and lowest thickness of stratigraphic units, the trends of increases and decreases the thickness and the dynamics of sedimentary basin areas. The final result provides a complete picture of the regional distribution of stratigraphic units in the context of geological tectonic events, described within the framework proposed by the Explanatory Notes of the Geological Map of the Republic of Croatia in 1:300 000 Scale. The implementation of GIS technology is essential for producing high-quality and easily reproducible geological maps. Also, various forms of geospatial data and complex georeferenced database are needed for current and future data analysis.

Basic Geological Map, Croatia, GIS, stratigraphy, interpolation

Publikacija sarzi odabrane prezentacije sa skupa The 15th Hungarian and 3rd Hungarian Croatian Geomathematical Convent, održanog svibnju 2011., Mórahalom, Mađarska.