@inproceedings{Schulz2013CrossLevel,
 author = {Schulz, Hans-J\"{o}rg and Hadlak, Steffen and Schumann, Heidrun},
 title = {A Visualization Approach for Cross-level Exploration of Spatiotemporal Data},
 booktitle = {Proceedings of the 13th International Conference on Knowledge Management and Knowledge Technologies},
 series = {i-Know '13},
 year = {2013},
 isbn = {978-1-4503-2300-0},
 location = {Graz, Austria},
 pages = {2:1--2:8},
 articleno = {2},
 numpages = {8},
 url = {http://doi.acm.org/10.1145/2494188.2494199},
 doi = {10.1145/2494188.2494199},
 acmid = {2494199},
 publisher = {ACM},
 address = {New York, NY, USA},
 keywords = {exploratory data analysis, multi-resolution analysis, multilevel visualization, spatiotemporal visualization},
}