Freek van Walderveen

I am a PhD stu­dent at the MADAL­GO re­search cen­ter of the Uni­ver­si­ty of Aarhus. I am in­ter­est­ed in al­go­rith­mics in gen­er­al, and espe­cial­ly I/O-ef­fi­cient ge­o­met­ric and graph al­go­rithms. I re­ceived my mas­ter de­gree from the Eind­hoven Uni­ver­si­ty of Tech­nol­o­gy.

In my spare time I'm an ac­tive con­trib­u­tor to the Open­StreetMap pro­ject, pro­vid­ing street-level maps with source data and many in­ter­est­ing de­tails, all un­der a friend­ly li­cence.

Contact information

Publications

• Two-di­men­sion­al range di­am­e­ter queries.
  With Pooya Davoodi and Michiel Smid.
  To ap­pear in LAT­IN2012.
  
  
• Clean­ing mas­sive sonar point clouds
  With Lars Arge, Kasper Green Larsen, and Thomas Mølhave.
  In 18th ACM SIGSPA­TIAL GIS 2010, pages 152–161, Novem­ber 2010.
  Pre­sen­ta­tion
  
  
• Con­structabil­i­ty of trip-lets
  With Jeroen Keiren and Alexan­der Wolff.
  In Col­lec­tion of ab­stracts of the 25th Eu­ro­pean Work­shop on Comp­uta­tion­al Ge­om­e­try, pages 251–254, March 2009.
  Pre­sen­ta­tion
  
  
• Four-di­men­sion­al Hilbert curves for R-trees
  With Her­man Haver­ko­rt.
  In Pro­ceed­ings of the 11th Work­shop on Al­go­rithm En­gin­eer­ing and Ex­per­i­ments (ALENEX09), pages 63–73, Jan­uary 2009.
  Jour­nal ver­sion to ap­pear in ACM Jour­nal on Ex­per­i­men­tal Al­go­rith­mics.
  
  
• Loc­al­i­ty and bound­ing-box qual­i­ty of two-di­men­sion­al space-fill­ing curves
  With Her­man Haver­ko­rt.
  In D. Halper­in and K. Mehlhorn, ed­i­tors, ESA 2008, LNCS 5193, pages 515–527. Springer-Ver­lag, Septem­ber 2008.
  Jour­nal ver­sion in Com­pu­ta­tion­al Ge­om­e­try: The­o­ry and Ap­pli­ca­tions 43:2, pages 131–147, Febru­ary 2010.
  
  
• Space-fill­ing curve prop­er­ties for ef­fi­cient spa­tial in­dex struc­tures
  With Her­man Haver­ko­rt.
  In S. Petit­jean, ed­i­tor, Col­lec­tion of ab­stracts of the 24th Eu­ro­pean Work­shop on Comp­uta­tion­al Ge­om­e­try, pages 51–54, March 2008.
  This is an ex­tend­ed ab­stract of the re­sults in Loc­al­i­ty and bound­ing-box qual­i­ty of two-di­men­sion­al space-fill­ing curves and Four-di­men­sion­al Hilbert curves for R-trees.