MAP MATCHING METHOD WITH CONSIDERATION OF ERROR IN NETWORK COORDINATES

  • NAKANISHI Wataru
    東京工業大学 環境・社会理工学院土木・環境工学系
  • FUSE Takashi
    東京大学 大学院工学系研究科社会基盤学専攻

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Other Title
  • 測位値に基づく歩行経路の逐次推定におけるネットワークの誤差に関する検討

Abstract

Estimation of pedestrian behavior in high-resolution is expected to advance the facility placement along the street. Generally, when capturing the walking trajectory as high resolution, it does not exist directly above the road network. However, the conventional map matching method, in which measurement coor- dinates are matched onto the network, has a problem from this viewpoint. Therefore, in this research, we propose a method to explicitly consider errors of network on continuous space. We sequentially estimate the deviation of the walking trajectory from the network as a latent variable by the GNSS measurement, taking the positioning error into account at the same time. From the measurement with error, we for- mulated a trajectory estimation which can describe the movement on the network and does not limit the actual position on the network. We showed the usefulness of the proposed method through application to simulation data in multiple settings.

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