Journal cover Journal topic
AGILE: GIScience Series Open-access proceedings of the Association of Geographic Information Laboratories in Europe
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Volume 1
AGILE GIScience Ser., 1, 21, 2020
https://doi.org/10.5194/agile-giss-1-21-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
AGILE GIScience Ser., 1, 21, 2020
https://doi.org/10.5194/agile-giss-1-21-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  15 Jul 2020

15 Jul 2020

Window Operators for Processing Spatio-Temporal Data Streams on Unmanned Vehicles

Tobias Werner and Thomas Brinkhoff Tobias Werner and Thomas Brinkhoff
  • Jade University of Applied Sciences, Institute for Applied Photogrammetry and Geoinformatics, Oldenburg, Germany

Keywords: Spatio-Temporal, Data Stream, Window Operator, Moving Object, Unmanned Vehicle

Abstract. Unmanned aerial and submersible vehicles are used in an increasing number of applications especially for data collection in misanthropic environments. During a mission, such vehicles generate multiple spatio-temporal data streams suitable to be processed by data stream management systems (DSMS). The main approach of a DSMS is limiting the elements of a stream by using sliding and tilting windows with time intervals as temporal condition. However, due to varying vehicle speed and limited on-board resources, such temporal windows do not provide adequate support for spatio-temporal problems. For solving this problem, we propose a set of six new spatio-temporal window operators in this paper. This set comprises of sliding distance, tilting distance, tilting waypoint, session distance, jumping distance and an area window to limit stream elements based on spatial conditions. Each of the listed operators provides an individual behaviour to support sophisticated applications like spatial interpolation and forecasting. An evaluation based on an example trajectory shows the benefit of the presented operators for spatio-temporal applications.

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