Abstract
Abstract. This paper presents the generation of the 3D national building geo-data model of Turkey, which is compatible with the international OGC CityGML Encoding Standard. We prepare an ADE named CityGML-TRKBIS.BI 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 remodelled in order to generate the national large scale 3D geo-data model for Turkey. Specific attention has been paid to data groups that have different class structure according to related CityGML data themes such as building data model. Current 2D geo-information model for building data theme of Turkey (TRKBIS.BI) was established based on INSPIRE specifications for building (Core 2D and Extended 2D profiles), ISO/TC 211 standards and OGC web services. New version of TRKBIS.BI which is established according to semantic and geometric rules of CityGML will represent 2D-2.5D and 3D objects. After a short overview on generic approach, this paper describes extending CityGML building data theme according to TRKBIS.BI through several steps. First, building models of both standards were compared according to their data structure, classes and attributes. Second, CityGML building model was extended with respect to TRKBIS needs and CityGML-TRKBIS Building ADE was established in UML. 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.
Highlights
In recent years considerable progresses have been realized in modelling 3D geo-data as CityGML ADE for different domains such as noise mapping (Czerwinski et al 2007; Wilson 2011; OGC 2012), utility networks (Becker et al 2011; Becker et al 2013); immovable property taxation (Çaǧdaş 2012); time dependent variables (Wilson et al 2011); inclusive routing (Prandi et al 2013); energy potential assessment (Wate & Saran 2015; Bahu & Nouvel 2015; Krüger & Kolbe 2012; Kaden & Kolbe 2014; Nouvel et al 2015), ubiquitous network robots services (OGC 2012), etc
Due to fact that in CityGML specifications ADE generation is described only in XML, the approach that is described in OGC 12-066 referenced numbered “Modeling an ADE of CityGML in Unified Modeling Language (UML)”-best practice paper is selected as guidance to establish the CityGML-TRKBIS.BI ADE in UML, as purpose of the research presented in this paper
Selecting a formal modelling language Defining correspondences between semantic classes of the application and CityGML generic classes Deciding which subclasses should be extended Defining application code lists Defining a geometry representation for each class for each applicable level of detail Defining topologically correct LOD. In this concept, corresponding classes, attributes, code lists and code list values are determined between CityGML Building model and TRKBIS.BI data themes (Table 1)
Summary
In recent years considerable progresses have been realized in modelling 3D geo-data as CityGML ADE for different domains such as noise mapping (Czerwinski et al 2007; Wilson 2011; OGC 2012), utility networks (Becker et al 2011; Becker et al 2013); immovable property taxation (Çaǧdaş 2012); time dependent variables (Wilson et al 2011); inclusive routing (Prandi et al 2013); energy potential assessment (Wate & Saran 2015; Bahu & Nouvel 2015; Krüger & Kolbe 2012; Kaden & Kolbe 2014; Nouvel et al 2015), ubiquitous network robots services (OGC 2012), etc. To test all stages of the framework for Urban GIS Turkey, Building data theme is mapped with CityGML-Building thematic model. Attributes, code lists and code list values of the TRKBIS are tried to be mapped with related CityGML concept.
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