Abstract
Abstract. The Open Geospatial Consortium (OGC) CityGML standard offers a Level of Detail (LoD) concept that enables the representation of CityGML features from a very detailed to a less detailed description. Due to a rising application variety, the current LoD concept seems to be too inflexible. Here, we present a multi representation concept (MRC) that enables a user-defined definition of LoDs. Because CityGML is an international standard, official profiles of the MRC are proposed. However, encoding of the defined profiles reveals many problems including mapping the conceptual model to the normative encoding, missing technologies and so on. Therefore, we propose to use the MRC as a meta model for the further definition of an LoD concept for CityGML 3.0.
Highlights
The Open Geospatial Consortium (OGC) CityGML standard (Gröger et al, 2012; Gröger and Plümer, 2012) is an interoperable data model for the representation of semantically enriched virtual 3D city models
We argue that the following two paths should be forged to keep the idea of the multi representation concept (MRC) without the need of inapplicable profiles: First, Level of Detail (LoD) specific geometry representations will be modelled as geometry attributes for each feature type
We presented a multi-representational concept as a proposal for the further development of the Level of Detail concept of CityGML, the international OGC standard for semantical 3D city models
Summary
The Open Geospatial Consortium (OGC) CityGML standard (Gröger et al, 2012; Gröger and Plümer, 2012) is an interoperable data model for the representation of semantically enriched virtual 3D city models. This includes, first, a gradual refinement of the geometrical characteristic, and second, the adjunction of semantic properties Due to this LoD concept, CityGML is able to represent single buildings, city quarters, whole cities and even regions and, is suitable for a wide range of different applications.
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