Inferring and focusing areas of interest from GPS traces

Authors:
Pablo Martinez Lerin;Daisuke Yamamoto;Naohisa Takahashi
Affiliations:
Dept. of Computer Science and Engineering, Nagoya Institute of Technology, Showaku, Nagoya, Japan;Dept. of Computer Science and Engineering, Nagoya Institute of Technology, Showaku, Nagoya, Japan;Dept. of Computer Science and Engineering, Nagoya Institute of Technology, Showaku, Nagoya, Japan
Venue:
W2GIS'11 Proceedings of the 10th international conference on Web and wireless geographical information systems
Year:
2011

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Abstract

Advanced GIS applications and GPS loggers allow travelers to record their own tracks and later examine, modify and share them. Searching for the areas of interest, AOIs, however, is often not an easy task, especially with long routes. This paper proposes a system for inferring and focusing AOIs, from a GPS trace. The proposed system consists of three main functions: fragmentation, defragmentation, and focusing. The fragmentation detects the changes of the travelling pace and decomposes the GPS trace into a large number of small fragments according the traveling pace while the defragmentation composes adjacent fragments into one fragment which is inside the AOI. The focusing provides a Focus+Context+Glue map where the Focus is an area of a large-scale map including the AOI that enables users to understand details of the AOI. We have developed a prototype of the proposed method that includes the above features and evaluated the feasibility and advantages of the proposed system.