期刊名称：GI_FORUM - Journal for Geographic Information Science
电子版ISSN：2308-1708
出版年度：2013
页码：197-205
DOI：10.1553/giscience2013s197
出版社：ÖAW Verlag, Wien
摘要：City models are extended recently to include utilities infrastructure e.g. CityGML/UtilityNetwork ADE. The 3D geometry representation in these models is utilizing the concept ofboundary representation (B-Rep), where planar faces and straight edges enclose theboundary. In case of utilities network, B-Rep would result in an extensive amount ofstorage space. This paper presents a new data type compatible to the swept representation,as well as the required algorithm to extract the needed information from the 3D utilitynetwork object represented as (B-Rep), i.e. centerlines as well as their profile information,and store them in the new custom data type. Another algorithm allows the generation of Brepfor visualization purposes. To show the effectiveness of the presented approach weaccomplished the export of utility network into CityGML UtiltiyNetworkADE. Several 3Dnetwork object types (e.g. pipes, fitting) are exported to the new data type. The tests showthe feasibility of the data type to reduce storage space, to create B-rep for visualization aswell as to extract a graph for analysis. The new data types as well as the mentionedalgorithms are implemented in Spatial-DBMS.
