CONCEPTUAL MODEL OF CITYGML RESTFUL WEB SERVICE
A 3D city model is considered as the digital representation of a city that may decompose into its objects (such as buildings, roads, railways, terrain, water, vegetation etc.) with clearly defined semantics, spatial and thematic properties. Depending on the level of detail, these objects may further decompose into more detailed features. The OGC standard CityGML, optimally allows integration of the diversified geoinformation of the aforementioned elements and provides multiple resolutions at different levels of detail (LoDs). Retrieving information from this standard is a challenge, in terms of interoperability, implementing the Web Service Technology. Within this technology, this paper examines and presents the conceptual model of the CityGML RESTful Web Service regarding all main resources which are structured according to the ten thematic modules of CityGML, in all available LoDs.