![]() ![]() Vector data are stored in computer memory using the coordinates of points and topological relations (Hofierka, 2003). ![]() Object reality is represented by geometric types (elements) composed of points, lines and polygons. Vector representation of conceptual models of reality is based on the object position the explicit modeling of space. For façade plan processing the vector data model was applied. Concise definition is according to Maguire (1991), which describes the GIS as an organized set of computer hardware, software and geographic data for the efficient acquisition, storage, editing, management, analyzing and displaying all forms of geographic information. ![]() There are many definitions that describe the Geographic Information System. The main instruments, except of external graphics modulus for processing, vectorization, analysis and visualization are Geographic Information Systems environment (GIS) and database systems. Temperature, humidity, presence of organic acids and dissolved carbon dioxide are particularly most relevant to the extent of damage caused by chemical weathering (Winkler, 1997). Chemical weathering is influenced by the presence of water and dissolved chemicals and gases. The chemical weathering processes especially are dissolution, oxidation and reduction, carbonatization, hydration and hydrolysis. Factors controlling chemical weathering are following (Ollier, 1969 Winkler 1997): i) concentration of hydrogen ions in system (pH) ii) its ionic potential iii) and its oxidation/reduction potential. Chemical weathering is a very complicated process during which the interaction among minerals and present solutions causes mineralogical changes and may lead to the degradation of stone. intensify the frost action, and also shown that the degree of stone damage depends on the combination of salts involved. ![]()
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