"Inventing a graphical method is easy. Inventing one that works is difficult."
Cleveland 1987



Contact

Dr. Alexander Klippel
Department of Geography, GeoVISTA Center
The Pennsylvania State University
Walker 302
University Park, PA 16802
USA
Email: klippel AT psu.edu

 

Dr. Xiaolong (Luke) Zhang
Information Sciences and Technology
The Pennsylvania State University
307 DĀ Information Sciences and Technology Building
University Park, PA 16802
USA
Email: lzhang AT ist.psu.edu

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