Modeling Turkey National 2D Geo-Data Model as a CityGML Application Domain Extension in UML

Abstract

This paper presents the
 generation of the 3D national geo-data model of Turkey, which is compatible
 with the international OGC CityGML Encoding Standard. We prepare an ADE named CityGML-TRKBIS
 that is produced by extending existing thematic modules of CityGML according to
 TRKBIS needs. All thematic data groups in TRKBIS geo-data model have been
 remodeled in order to generate the national large scale 3D geo-data model for
 Turkey. Within the concept of reference model-driven framework for modelling
 CityGML ADEs in UML, the first step is conceptual mapping between CityGML and
 national information model. To test all stages of the framework for Urban GIS
 Turkey, Building data theme is mapped with CityGML-Building thematic model. All
 classes, attributes, code lists and code list values of the TRKBIS is tried to
 be mapped with related CityGML concept. New classes, attributes and code list
 values that will be added to CityGML Building model are determined based on
 this conceptual mapping. Finally the new model for CityGML-TRKBIS.BI is
 established in UML with subclassing of the related CityGML classes. This study
 provides new insights into 3D applications in Turkey. The generated 3D geo-data
 model for building thematic class will be used as a common exchange format that
 meets 2D, 2.5D and 3D implementation needs at national level.