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This public version of the Wiki was developed by the '''SIG3D Quality Working Group''' and represents the essence of intensive discussions over the last years. We want to give you some hints and recommendations about a "correct" '''modeling''' of 3D city model objects in CityGML. Please note that our goal was explicitely not to define rules for collecting source data for 3D city model objects.

This public version of the Wiki was developed by the '''SIG3D Quality Working Group''' and represents the essence of intensive discussions over the last years. We want to give you some hints and recommendations about a "correct" '''modeling''' of 3D city model objects in CityGML. Please note that our goal was explicitely not to define rules for collecting source data for 3D city model objects.

The Quality Concept of the SIG3D Quality Working Group covers the whole process of generating a CityGML based city model. Based on [[General|general definitions]] we formulated a [[Modeling|Modeling Guide for Buildings]], so that we can define modular and transparent [[Testing|testing conditions]] usable in an application or project environment defined by [[Profiles]]. These are the necessary preconditions for a comprehensive and comparative [[Certification]] process. All these components are included as key components of a [[Standard Specification]] ( in Germany a so called "Standardleistungsbuch" ) to ensure a sustainable and economically [[Continuation]] process of modeling and maintaining city models.

The Quality Concept of the SIG3D Quality Working Group covers the whole process of generating a CityGML based city model. Based on [[General|general definitions]] we formulated a [[Modeling|Modeling Guide for Buildings]], so that we can define modular and transparent [[Testing|testing conditions]] usable in an application or project environment defined by [[Profiles]]. These are the necessary preconditions for a comprehensive and comparative [[Certification]] process. All these components are included as key components of a [[Standard Specifications]] ( in Germany a so called "Standardleistungsbuch" ) to ensure a sustainable and economically [[Continuation]] process of modeling and maintaining city models.