@inproceedings{HK98, author = {Herrmann, Annemarie and Keim, Daniel A.}, booktitle = {Proc. Visualization '98, Research Triangle Park, NC}, month = {Sep}, pages = {181--188, 531}, title = {The Gridfit Algorithm: An Efficient and Effective Approach to Visualizing Large Amounts of Spatial Data}, year = {1998} }