Construction and Visualization of a Three Dimensional Geologic Model Using GRASS GIS

摘要: Recently, the need of geologic information has been rising in many fields such as environmental geology, disaster mitigation, and urban geological applications. For these fields, it is effective to provide a three dimensional(3-D) model that can be generated visualized general purpose GIS software. The present work aims at introducing basic theory, implementing methodology algorithms for 3-D modeling visualization using Open Source GRASS environment. constructed from boundary surfaces units logical structure. construction proposed are based on function g. g assigns unique unit every point objective space. surface divides space into two subspaces, were estimated data field survey. showing hierarchical relationship between boundaries automatically stratigraphic sequence knowledge structures. Based algorithms, virtually GIS. Applying this model, various section models Further, “Nviz” was used dynamic crosssections generation animated image sequences.