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Statistical Correlation between Monthly Electric Power Consumption and VIIRS Nighttime Light

by Jintang Lin 1 and Wenzhong Shi 2,*
1
School of Resource Engineering, Longyan University, Longyan 364012, China
2
Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China
*
Author to whom correspondence should be addressed.
ISPRS Int. J. Geo-Inf. 2020, 9(1), 32; https://doi.org/10.3390/ijgi9010032
Received: 25 November 2019 / Revised: 30 December 2019 / Accepted: 4 January 2020 / Published: 5 January 2020
The nighttime light (NTL) imagery acquired from the Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) enables feasibility of investigating socioeconomic activities at monthly scale, compared with annual study using nighttime light data acquired from the Defense Meteorological Satellite Program/Operational Linescan System (DMSP/OLS). This paper is the first attempt to discuss the quantitative correlation between monthly composite VIIRS DNB NTL data and monthly statistical data of electric power consumption (EPC), using 14 provinces of southern China as study area. Two types of regressions (linear regression and polynomial regression) and nine kinds of NTL with different treatments are employed and compared in experiments. The study demonstrates that: (1) polynomial regressions acquire higher reliability, whose average R square is 0.8816, compared with linear regressions, whose average R square is 0.8727; (2) regressions between denoised NTL with threshold of 0.3 nW/(cm2·sr) and EPC steadily exhibit the strongest reliability among the nine kinds of processed NTL data. In addition, the polynomial regressions for 12 months between denoised NTL with threshold of 0.3 nW/(cm2·sr) and EPC are constructed, whose average values of R square and mean absolute relative error are 0.8906 and 16.02%, respectively. These established optimal regression equations can be used to accurately estimate monthly EPC of each province, produce thematic maps of EPC, and analyze their spatial distribution characteristics.
Keywords: nighttime light; electric power consumption; VIIRS DNB; monthly; remote sensing nighttime light; electric power consumption; VIIRS DNB; monthly; remote sensing
MDPI and ACS Style

Lin, J.; Shi, W. Statistical Correlation between Monthly Electric Power Consumption and VIIRS Nighttime Light. ISPRS Int. J. Geo-Inf. 2020, 9, 32.

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