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SIAM Journal on Computing
Introduction to algorithms
Clin d'oeil on L1-embeddable planar graphs
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PODS '00 Proceedings of the nineteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Indexing the positions of continuously moving objects
SIGMOD '00 Proceedings of the 2000 ACM SIGMOD international conference on Management of data
A foundation for representing and querying moving objects
ACM Transactions on Database Systems (TODS)
SODA '01 Proceedings of the twelfth annual ACM-SIAM symposium on Discrete algorithms
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The LEDA Platform of Combinatorial and Geometric Computing
ICALP '97 Proceedings of the 24th International Colloquium on Automata, Languages and Programming
A Spatiotemporal Model and Language for Moving Objects on Road Networks
SSTD '01 Proceedings of the 7th International Symposium on Advances in Spatial and Temporal Databases
Graph Theory With Applications
Graph Theory With Applications
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VLDB '03 Proceedings of the 29th international conference on Very large data bases - Volume 29
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Proceedings of the 13th annual ACM international workshop on Geographic information systems
Geoinformatica
Information Sciences: an International Journal
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PAISI, PACCF and SOCO '08 Proceedings of the IEEE ISI 2008 PAISI, PACCF, and SOCO international workshops on Intelligence and Security Informatics
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Information Systems
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Continuous evaluation of fastest path queries on road networks
SSTD'07 Proceedings of the 10th international conference on Advances in spatial and temporal databases
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Proceedings of the 2010 ACM SIGMOD International Conference on Management of data
An efficient location encoding method based on hierarchical administrative district
DEXA'05 Proceedings of the 16th international conference on Database and Expert Systems Applications
Shortest path and distance queries on road networks: an experimental evaluation
Proceedings of the VLDB Endowment
PA-tree: a parametric indexing scheme for spatio-temporal trajectories
SSTD'05 Proceedings of the 9th international conference on Advances in Spatial and Temporal Databases
Shortest path and distance queries on road networks: towards bridging theory and practice
Proceedings of the 2013 ACM SIGMOD International Conference on Management of Data
Shortest-path queries in static networks
ACM Computing Surveys (CSUR)
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We present a novel coding-based technique for answering spatial and spatiotemporal queries on objects moving along a system of curves on the plane such as many road networks. We handle join, range, intercept, and other spatial and spatiotemporal queries under these assumptions, with distances being measured along the trajectories. Most work to date has studied the significantly simpler case of objects moving in straight lines on the plane. Our work is an advance toward solving the problem in its more general form.Central to our approach is an efficient coding technique, based on hypercube embedding, for assigning labels to nodes in the network. The Hamming distance between codes corresponds to the physical distance between nodes, so that we can determine shortest distances in the network extremely quickly. The coding method also efficiently captures many properties of the network relevant to spatial and spatiotemporal queries. Our approach also yields a very effective spatial hashing method for this domain. Our analytical results demonstrate that our methods are space- and time-efficient.We have studied the performance of our method for large planar graphs designed to represent road networks. Experiments show that our methods are efficient and practical.