[mden]

Indeed :)

Curious, did you use any other information or was this a wild guess?

As a side note, if anyone wants to go into more depth, Samet's "Foundations of Multidimansional and Metric Data Structures" (http://www.amazon.com/Foundations-Multidimensional-Structure...) is an extensive survey of a lot of spatial data structures.

[dandroid17]

Simply mentioning PR and P Quadtrees tipped me off since that class is the only time I've ever heard of those data structures mentioned. Then I checked out your website and saw you went to UMD. Case closed, haha.