基于“珞珈一号”夜光遥感影像的粤港澳大湾区城市空间形态分析

doi:10.3969/j.issn.0255-8297.2020.03.012

Abstract

Abstract: In this paper, “LJ1-01” nighttime light (NTL) images are used to extract urban built-up areas of Guangdong-Hong Kong-Macao greater bay area (GBA) by employing simple threshold method and vegetation adjusted NTL urban index (VANUI). Comparing the two methods, VANUI is capable of reducing the over-saturations in LJ1-01 images, thus reducing misclassifications caused by “blooming”. The landscape indices of the urban builtup areas in GBA are calculated and analyzed. It is found that there are different patterns in distribution of built-up areas in different cities. As the cores of the development of GBA, Guangzhou, Shenzhen and Hong Kong have expanding urban areas. The urban built-up areas, like Dongguan, Foshan, Macao, Zhongshan and Zhuhai, are highly compact and integrated in spatial distribution. And the urban built-up areas of less developed cities, including Zhaoqing, Jiangmen and Huizhou, are small and separated. This study proves that the LJ1-01 nighttime light images can effectively reveal the urban spatial form of GBA, providing a basis for urban planning policy of GBA.

Key words: Guangdong-Hong Kong-Macao greater bay area (GBA), nighttime light (NTL) remote sensing image, vegetation adjusted NTL urban index (VANUI), landscape analysis

CLC Number:

P751.1

ZHANG Yuxin, LI Xi, SONG Yang, LI Changhui. Urban Spatial Form Analysis of GBA Based on “LJ1-01” Nighttime Light Remote Sensing Images[J]. Journal of Applied Sciences, 2020, 38(3): 466-477.

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Urban Spatial Form Analysis of GBA Based on “LJ1-01” Nighttime Light Remote Sensing Images

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