Efficient Querying and Animation of Periodic Spatio-Temporal Databases

  • Authors:
  • Peter Revesz;Mengchu Cai

  • Affiliations:
  • Department of Computer Science and Engineering, University of Nebraska–Lincoln, Lincoln, NE 68588, USA revesz@cse.unl.edu;IBM Silicon Valley Lab., San Jose, CA 95141, USA mcai@us.ibm.com

  • Venue:
  • Annals of Mathematics and Artificial Intelligence
  • Year:
  • 2002

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Abstract

We propose a representation of spatio-temporal objects with continuous and cyclic or acyclic periodic movements. We also describe an extended relational algebra query language for databases with such objects. We show that the new spatio-temporal databases are closed under the extended relational algebra queries, and each fixed relational algebra query can be evaluated in PTIME in the size of the input database.