Study on the spatial and temporal characteristics of the expansion of the built-up area in Guangdong-Hong Kong-Macao Greater Bay Area

doi:10.13474/j.cnki.11-2246.2022.0083

Abstract

Abstract: Based on the nighttime light data (DMSP/OLS,NPP/VIIRS) from 1992 to 2019,this paper refers to the built-up area data of the Guangdong-Hong Kong-Macao Greater Bay Area and compares the light threshold,and finally obtains the built-up area boundary of the Greater Bay Area.It makes a quantitative analysis of the spatiotemporal characteristics of the expansion of the built-up area of the Greater Bay Area from three aspects:expansion mode,expansion speed and expansion degree.At the same time,the spatial and temporal pattern characteristics of the expansion of the built-up area in the Greater Bay Area are also analyzed with the method of landscape ecology.The results show that:① The center of gravity of the Guangdong-Hong Kong-Macao Greater Bay Area urban agglomeration was located in Dongguan in 1992,and moved to Guangzhou in 2019,forming the development core area of the pearl river delta region with Guangzhou as the center.②The expansion of the whole region presents a trend of regional integration,with the speed of spread decreasing and the degree of spread increasing,and the radiation capacity of the Pearl River Delta region to the surrounding cities increasing.③The urban expansion mainly centers on the Pearl River Delta region and develops in an inverted "V" shape along the transportation lines.

Key words: Guangdong-Hong Kong-Macao Greater Bay Area;DMSP/OLS;NPP/VIIRS;temporal and spatial characteristics

CLC Number:

P208

KUANG Xu, LIU Chuanli, LI Minghai. Study on the spatial and temporal characteristics of the expansion of the built-up area in Guangdong-Hong Kong-Macao Greater Bay Area[J]. Bulletin of Surveying and Mapping, 2022, 0(3): 90-95,110.

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