Delimitation of Local climate zones based on ZABAGED database in the Czech Republic
In recent years the concept of Local climate zones (LCZ) has become the standard in study of urban climate. There are therefore efforts to use this classification as a mapping method. With a radical shift in the concept of LCZ have emerged new methodological problems (e.g. spatial resolution/pixel size, the degree of generalization, the method of calculating the physical a geometric parameters, validation and standardization of classification procedures etc.). Developing universal LCZ mapping method for the Czech Republic we are trying to address all of these problems. The first prototypes of classification based on decision rules established on the training areas were completed for Brno and Olomouc and their surroundings. Preliminary research has shown that the most suitable input data for classification provides vector database ZABAGED® covering the entire area of the Czech Republic. Validation through comparison of classification results based on data from ZABAGED® and classification result based on our own precise ad hoc data show a very good results for testing areas. Manual correction of input attributes is in some cases still unavoidable. However data preparation procedure is already reasonably time consuming. It turns out that LCZ classification made on the basis of the real physical properties of the environment is more accurate than classification based on remote sensing data based characteristic and therefore deserves further research.