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MMS Data Accuracy Evaluation by Distance of Reference Point for Construction of Road Geospatial Information

도로공간정보 구축을 위한 기준점 거리 별 MMS 성과물의 정확도 평가

  • Lee, Keun Wang (Department of the Multimedia Science, Chungwoon University) ;
  • Park, Joon Kyu (Department of Civil Engineering, Seoil University)
  • Received : 2021.12.04
  • Accepted : 2021.12.23
  • Published : 2021.12.31

Abstract

Precise 3D road geospatial information is the basic infrastructure for autonomous driving and is essential data for safe autonomous driving. MMS (Mobile Mapping System) is being used as equipment for road spatial information construction, and related research is being conducted. However, there are insufficient studies to analyze the effect of the baseline reference point distance, which is an important factor in the accuracy of the MMS outcome, on the accuracy of the outcome. Therefore, in this study, the accuracy of the data acquired using MMS by reference point distance was analyzed. Point cloud data was constructed using MMS for the road in the study site. For data processing, 4 data were constructed considering the distance from the reference point for MMS data, and the accuracy was analyzed by comparing the results of 12 checkpoints for accuracy evaluation. The accuracy of the MMS data showed a difference of -0.09 m to 0.11 m in the horizontal direction and 0.04 m to 0.19 m in the height direction. The error in the vertical direction was larger than that in the horizontal direction, and it was found that the accuracy decreased as the distance from the reference point increased. In addition, as the length of the road increases, the distance from the reference point may vary, so additional research is needed. If the accuracy evaluation of the method using multiple reference points is made in the future, it will be possible to present an effective method of using reference points for the construction of precise road spatial information.

정밀한 3차원 도로공간정보는 자율주행을 위한 기본 인프라로 안전한 자율주행을 위한 필수 데이터라 할 수 있다. MMS (Mobile Mapping System)은 도로공간정보 구축을 위한 장비로 활용되고 있으며, 관련 연구가 수행되고 있다. 하지만 MMS를 활용한 성과물의 정확도에 중요한 요인이 되는 기준점 거리가 성과물의 정확도에 미치는 영향을 분석한 연구는 부족한 실정이다. 이에 본 연구에서는 MMS를 이용하여 취득되는 데이터의 기준점 거리별 정확도를 분석하고자 하였다. 연구대상지 도로에 대해 MMS를 이용하여 포인트클라우드 데이터를 구축하였다. 데이터 처리는 MMS 데이터는 기준점과의 거리를 고려하여 4개의 데이터를 구축하였으며, 정확도 평가를 위해 12개의 검사점 성과와 비교하여 정확도를 분석하였다. MMS 데이터의 정확도는 수평방향으로 -0.09m~0.11m, 높이방향으로 0.04m~0.19m의 차이를 나타내었다. 수평방향에 비해 수직방향의 오차가 크게 나타났으며, 기준점과의 거리가 증가함에 따라 정확도가 감소함을 알 수 있었다. 또한 구간의 거리가 길어질수록 기준점과의 거리가 하나의 데이터 셋에서 달라질 수 있기 때문에 추가적인 연구가 필요하며, 향후 여러 개의 기준점을 사용하는 방법에 대한 정확도 평가가 이루어진다면 정밀한 도로공간정보 구축을 위한 효과적인 기준점 활용 방안을 제시할 수 있을 것이다.

Keywords

Acknowledgement

This work was supported by an Academic Research Fund of Chungwoon University in 2021.

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