The 9th International 3DGeoInfo 2014 conference will be held in Dubai, UAE, in November. This is perhaps the central event of the 3D city modelling research community, especially for the part focused on CityGML.
I will be presenting two papers:
- Improving the consistency of multi-LOD CityGML datasets by removing redundancy (doi:10.1007/978-3-319-12181-9_1)
This paper deals with the detection and linking of the geometries (linear rings and polygons) that reoccur within the same LOD and across multiple LODs. The paper describes the possible topological cases (see the figure below), show how to detect these relationships, and how to store them explicitly. A software prototype has been implemented to detect matching features within and across LODs, and to automatically link them by establishing explicit topological relationships (with XLink).
- Height references of CityGML LOD1 buildings and their influence on applications (doi:10.4233/uuid:09d030b5-67d3-467b-babb-5e5ec10f1b38)
The topic of this paper are the variants of models within the same LOD. For instance, a building in LOD1 may be represented as a block model with the top at the roof edges, or as another block model which top is at the top of the roof. The paper presents an inventory of such geometric references, and proves with experiments that it is very important to regard them, and to store them in the metadata.
(Edit: this work was extended and published in the ISPRS Journal of Photogrammetry and Remote Sensing).