CASE-TOOL FOR DESIGNING 3D GIS ON THE BASIS OF OPEN SOURCE LIBRARIES
The structure and content of the CASE-tool allowing to implement a given 3D GIS functionality are considered. In the process of using CASE-tools, variants of design solutions are generated. Structural and functional models and diagrams of interfaces interaction between open source libraries and personal developments, which do not have any analogues among libraries, are created for the development of 3D GIS. Header files generation on the selected programming language is performed in order to realize the system. The core can be set off in 3D GIS. It includes four major components providing a basic set of functions implemented in the majority of 3D GIS. The developed models such as the situation description model, the open source libraries description model, the projections model, the broker model, and the compositional model increase the efficiency of the developed 3D GIS components. The models proposed in the article are related to the three stages of the 3D GIS life cycle.