2.6. UML class diagram

The following pages cite several parts of the CityGML specification [GKNH2012] which are necessary for a better understanding. Main focus is put on explaining the customization and the differences to the CityGML standard.

Design decisions in the model are explicitly visualised within the UML diagrams. Following models are presented in detail:

• 2.6.1. Geometric-topological Model
• 2.6.2. Implicit Geometry
• 2.6.3. Appearance Model
• 2.6.4. Thematic model

For intuitive understanding, classes which will be merged to a single table in the relational schema, are shown as orange blocks in the UML diagrams. n:m relations, which only can be represented by additional tables, are represented as green blocks.