Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회지)

Korean Society of Surveying, Geodesy, Photogrammetry and Cartography (한국측량학회)
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Detecting and Extracting Changed Objects in Ground Information

지반정보 변화객체 탐지·추출 시스템 개발

  • Received : 2021.11.26
  • Accepted : 2021.12.22
  • Published : 2021.12.31
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Abstract

An integrated underground spatial map consists of underground facilities, underground structures, and ground information, and is periodically updated. In this paper, we design and implement a system for detecting and extracting only changed ground objects to shorten the map update speed. To find the changed objects, all the objects are compared, which are included in the newly input map and the reference map in the integrated map. Since the entire process of comparing objects and generating results is classified by function, the implemented system is composed of several modules such as object comparer, changed object detector, history data manager, changed object extractor, changed type classifier, and changed object saver. We use two metrics: detection rate and extraction rate, to evaluate the performance of the system. As a result of applying the system to boreholes, ground wells, soil layers, and rock floors in Pyeongtaek, 100% of inserted, deleted, and updated objects in each layer are detected. In addition, it provides the advantage of ensuring the up-to-dateness of the reference map by downloading it whenever maps are compared. In the future, additional research is needed to confirm the stability and effectiveness of the developed system using various data to apply it to the field.

지하공간 통합지도는 지하시설물, 지하구조물, 지반정보로 구성되어 있으며, 주기적으로 갱신이 발생하고 있다. 본 논문에서는 통합지도 갱신 속도를 단축하기 위해 변화된 지반정보만을 탐지 및 추출하는 시스템을 설계하고 이를 구현하였다. 변화 객체를 찾아내기 위해 신규 입력된 지도와 통합지도에 저장된 참조 지도에 포함된 모든 객체들을 비교하였다. 객체를 비교하여 결과를 생성하는 전체 과정을 기능별로 분류하였으므로, 구현된 시스템은 객체 비교기, 변화 객체 탐지기, 과거 데이터 관리기, 변화 객체 추출기, 변화 유형 분류기, 변화 객체 저장기 등의 모듈로 구성되었다. 구현된 시스템의 성능을 평가하는 지표로 변화 객체 탐지율 및 추출률을 사용한다. 개발된 컴포넌트를 평택시 시추공, 관정, 지층, 암상 등에 적용한 결과 각 레이어의 신규, 삭제, 변경(속성) 객체들을 각각 100% 탐지하였다. 또한, 지도를 비교할 때마다 참조 지도를 다운로드 받음으로써 참조 지도의 최신성이 보장되는 장점을 제공하였다. 추후, 현업에 적용하기 위해 다양한 데이터를 사용하여 개발된 결과의 안정성과 효율성을 확인하는 연구가 필요하다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 21DCRU-B158151 -02).

References

  1. Hankook Ilbo (2021), https://www.hankookilbo.com/News/Read/201908151298352651, (last date accessed: 18 November 2021.)
  2. Jun, J.A., Lee, J.H., Chin, C.H., Choi, C.H., Lee, S.J., Yum, B.W., and Lee, I.H. (2015), IoT based Urban Underground Utility Monitoring and Management System, Electronics and Telecommunications Trends, ETRI, Vol. 30, No. 5, pp. 28-38.
  3. Kim, K., Lee, K.W., Kim, B.W., and Jang, I.S. (2020a), Updated Object Extraction in Underground Facility based on Centroid, Korea Information Processing Society Review Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography, Vol. 38, No. 6, pp. 553-559. (in Korean with English abstract)
  4. Kim, K., Lee, H.S., and Kim, J. (2020b), A Study on Updated Object Detection and Extraction of Underground Information, Journal of Software Assessment and Valuation, Vol. 16, No. 2, pp. 99-107. (in Korean with English abstract) https://doi.org/10.29056/jsav.2020.12.11
  5. Kim, K., Kim, B.W., and Jang, I.S. (2021), Development of Changed Object Detection Technology for Ground Information, Proceedings of Korean Society for Geospatial Information Science, 4-6 November, Jeju, Korea, pp. 286-287. (in Korean)
  6. Korea Land Daily (KLD), (2021), http://www.ikld.kr/news/articleView.html?idxno= 239920, (last date accessed: 19 November 2021.)
  7. Mapscape (2020), http://mapscape.eu/telematics/incrementalupdating.html (last date accessed: 2 October 2020.)
  8. Ministry of Land, Infrastructure and Transport (MOLIT) Press Release (2019), The 1st Basic Plan for Underground Safety Management, 2 September 2019. (in Korean)
  9. Ministry of Land, Infrastructure and Transport (MOLIT) Press Release (2020), The number of ground subsidence nationwide in 2019 was 192, down 43% from the previous year, 18 February 2020. (in Korean)
  10. Park, D.H., Jang, Y.G., Lee H. (2017), A Study on Construction Plan of Geotechnical Information for Underground Space Safety Impact, Proceedings of Korean Society for Geospatial Information Science, 25-26 May, Seoul, Korea, pp. 27-28. (in Korean)
  11. Park, D.H., Jang, Y.G., Choi, H.S. (2018), A Study on the Construction Plan of 3D Geotechnical Information for the Support of Underground Space Safety, Journal of the Korean Association of Geographic Information Studies, Vol. 21, No. 1, pp. 23-34. (in Korean with English abstract) https://doi.org/10.11108/KAGIS.2018.21.1.023
  12. Stanojevic, R., Abbar, S., Thirumuruganathan, S., Francisci Morales, G. Chawla, S., Filali, F., and Aleimat, A. (2018), Road network fusion for incremental map updates, Progress in Location Based Services, Springer, pp. 91-109.
  13. Vesely, M., Novak, C., Reh, A., and Mayr, H. (2008), Incremental Navigation Map Enhancement with GPS Tracks from Heterogeneous Sources, Proceedings of the International Conference on Artificial Intelligence-2008, 14-17 July, Las Vegas, Nevada, USA, Vol. 2, pp. 787-793.