@inproceedings{htgd09,
    author = {Hagedorn, Benjamin and Trapp, Matthias and Glander, Tassilo and Döllner, Jürgen},
    booktitle = {First International Workshop on Indoor Spatial Awareness (ISA)},
    title = {Towards an Indoor Level-of-Detail Model for Route Visualization},
    year = {2009},
    pages = {692--697},
    publisher = {IEEE Computer Society Press},
    doi = {10.1109/MDM.2009.118},
}