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Continuous Obstructed Detour Queries

Authors Rudra Ranajee Saha, Tanzima Hashem, Tasmia Shahriar, Lars Kulik

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Author Details

Rudra Ranajee Saha
  • Department of CSE, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Tanzima Hashem
  • Department of CSE, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Tasmia Shahriar
  • Department of CSE, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh
Lars Kulik
  • Dept of CIS, University of Melbourne, Melbourne, Australia

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Rudra Ranajee Saha, Tanzima Hashem, Tasmia Shahriar, and Lars Kulik. Continuous Obstructed Detour Queries. In 10th International Conference on Geographic Information Science (GIScience 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 114, pp. 14:1-14:16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)
https://doi.org/10.4230/LIPIcs.GISCIENCE.2018.14

Abstract

In this paper, we introduce Continuous Obstructed Detour (COD) Queries, a novel query type in spatial databases. COD queries continuously return the nearest point of interests (POIs) such as a restaurant, an ATM machine and a pharmacy with respect to the current location and the fixed destination of a moving pedestrian in presence of obstacles like a fence, a lake or a private building. The path towards a destination is typically not predetermined and the nearest POIs can change over time with the change of a pedestrian's current location towards a fixed destination. The distance to a POI is measured as the summation of the obstructed distance from the pedestrian's current location to the POI and the obstructed distance from the POI to the pedestrian's destination. Evaluating the query for every change of a pedestrian's location would incur extremely high processing overhead. We develop an efficient solution for COD queries and verify the effectiveness and efficiency of our solution in experiments.

Subject Classification

ACM Subject Classification
  • Information systems → Location based services
Keywords
  • Obstacles Continuous Detour Queries Spatial Databases

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References

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