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A Study on the Spatial Position Problem of PM Monitoring Stations Using Voronoi Technique and Density Analysis

보로노이 기법과 밀도분석을 활용한 미세먼지 측정소 공간적 위치 문제 연구

  • 정종철 (남서울대학교 공간정보공학과)
  • Received : 2018.09.26
  • Accepted : 2018.11.22
  • Published : 2018.12.10

Abstract

In the Seoul Metropolitan City, the PM(pariculate matter) application used by the citizens provides the PM concentration of the nearest monitoring stations located on the PM monitoring stations. Currently, the selecting method of the PM monitoring network considered by the Ministry of Environment is based on considering the monitoring station distribution and population density only. In this study, we analyzed the distance between PM monitoring station and the administrative center point in addition to the above considerations. The number of test sites was verified and the range of coverage of each monitoring stations was indicated by using the Voronoi algorithm and hexagon grid. The spatial position problem of the PM monitoring station was suggested by spatial data analysis. The variables of spatial data analysis are single-family houses, apartments, $1^{st}$ class neighborhood, $2^{nd}$ class neighborhood, garbage disposal plant, hazardous material disposal facility, factory, and the density map. The analysis result of the selection criterion considering the additional variables for new PM monitoring stations was presented, in addition to the selection criteria provided by the Ministry of Environment.

서울시에서 시민들이 사용하는 미세먼지 앱은 위치기반으로 자신의 위치에서 가장 가까운 측정소의 미세먼지 농도를 제공받는다. 현재 환경부에서 고려하는 미세먼지 측정망 선정 방법은 측정소의 분포 및 인구밀도를 고려한 방식과 지도상의 표현방식이 주 결정방법이나 인위적인 변수 및 다른 환경요인을 고려하지 않는다. 본 연구에서는 미세먼지 측정소와 행정동의 대표성을 보여주는 행정동 중심점을 활용하여 측정소와 동중심의 거리에 대해 분석하였으며, 측정값을 제공하는 측정소의 개수를 확인하였다. 또한 보로노이 알고리즘과 헥사곤 격자를 활용하여 각 측정소의 제공범위를 면적으로 나타내며 현 측정소의 공간적인 위치의 문제점을 지적하였다. 공간분석을 위한 환경변수는 단독주택, 공동주택, 제1종 근린생활권, 제2종 근린생활권, 쓰레기처리장, 위험물처리시설, 공장이며 분석결과로 만들어진 신규 측정소 위치는 기존의 환경부에서 제공하는 선정기준이 아닌 추가적인 변수를 고려한 선정기준을 제시하였다.

Keywords

References

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