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Climate changes, as well as effects they generate, refer to a certain geographic space. Therefore, general purpose geographic information system (GIS) is necessary component of every research concerning climate changes. This research provides tracking of climate changes and analysis of their influence on large number of different factors: environment, agricultural production, water resources availability, forestry, biodiversity, energetics, infrastructural systems and changes of different gases concentration in atmosphere, social and economic factors, human health etc. This requires development of enterprise geographic information system that can provide storage, management and analysis of given data. This presentation is related to development of such GIS system at the Faculty of Electronic Engineering in Nis. Special attention will be paid to 2D and 3D visualization and analysis of data acquired from sensors that work in real time. Transformation and visualization of numerical simulations results is important feature of the developed system. It provides prediction of particular factor according to measured data and using models crated by numerical simulations. In addition, this part of GIS provides the capability of extraction of new information concerning climate changes impacts on the environment using data acquired from sensors or collected in other ways. Computation of correlation between different climate factors, as well as climate changes impacts on the environment, are the main tasks of the system. Also, special attention in GIS system development is dedicated to utilization of data acquired from meteorological radars. This data can be used for numerical simulations, for compliance with data acquired using other measuring methods and for analysis of climate changes impacts on the environment. Developed GIS is able to handle the analysis of high resolution data acquired from the outputs of meteorological impulse Dopler radars with dual polarization. Special attention is dedicated to the problem of assessment of precipitation, wind speed, turbulence and polarization parameters, based on radar measurements. GIS system provides comparative analysis of data acquired from radars and data about hydrometeors acquired using other measuring methods, as well as their classification. One of the research goals was development of methods for assimilation of satellite and radar data in the process of monitoring, research and climate forecast.