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This research investigates the impacts of artificial lights intensity, emitted from built-up area, on population estimation utilizing SNPP VIIRS DNB and land use and land cover (LULC) data. To do so, the performance comparison of population prediction for individual metropolitan cities and provinces in South Korea was made with simple regression model (SRM) consisting of two kinds of nighttime lights (NTL) intensity derived from only built-up area and all types of LULC. The SRM of urban land use was found to be superior to that of all LULC types in terms of positive correlation, model fit, statistical significance, and population prediction results. Nonetheless, according to regression diagnotics, this model was hard to satisfy the basic assumption of linearity. Therefore, it was required to refine the current model with either the adoption of polynomial or the transformation of variables to predict population in future research.
본 연구는 SNPP VIIRS DNB 영상자료와 토지피복도를 활용하여 시가지에서 방출된 야간 인공조명 강도가 인구예측에 미치는 영향을 고찰한다. 이를 위해 시가지 피복 또는 모든 피복유형에 해당하는 화소의 인공조명 강도를 각각 도출한 후 이들을 설명변수로 구성한 단순회귀모형에 기반한 남한 광역시도의 인구추정 결과를 비교했다. 시가화 건조지역만을 고려한 모형의 정적 상관성, 모형의 적합도 및 회귀계수의 통계적 유의성뿐만 아니라 인구예측 결과는 모든 피복유형을 포함한 모형보다 우수했다. 그러나 진단 결과에 따르면 이 모형은 선형성 기본 가정을 충족하기 어려운 것으로 나타났다. 따라서 향후 연구에서는 다항식의 적용 또는 변수의 변환에 기초한 모형 정교화를 통해 인구를 예측할 필요성이 제기된다.
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- Publisher :The Korean Cartographic Association
- Publisher(Ko) :한국지도학회
- Journal Title :Journal of the Korean Cartographic Association
- Journal Title(Ko) :한국지도학회지
- Volume : 20
- No :2
- Pages :13-24
- DOI :https://doi.org/10.16879/jkca.2020.20.2.013