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A platform for research: civil engineering, architecture and urbanism
Urban Expansion in Ho Chi Minh City Detected from Landsat Satellite Images
Ho Chi Minh City (HCMC) is one of the largest cities in Vietnam in terms of economic and social development, with a densely populated population. Over the past four decades, the city's urban space has expanded enormously. Urban expansion has a great impact on the city’s environment and infrastructure. This study focuses on exploiting Landsat images from 1979 to 2022 to reveal the urban expansion of HCMC. Firstly, the city’s land cover layers are extracted from Landsat images using the Random Forest Classifier. The land cover layer presents its four types of built-up area, bare-soil, vegetation, and water surface. Secondly, the urban areas are determined from the built-up mask using the spatial filtering technique with a 15 × 15 pixel window in which pixels are labelled as an urban area if the window contains 70% of built-up area. As a result, the urban area increases from 50.6 km2 in 1979 to 738.2 km2 in 2022, occupying from 2.4% to 32.2% of the city’s total area. Moreover, the city was expanded at an average rate of 31.6% from the center and its main development is obviously to the East during the observed period. Additionally, there are two secondary directions to the Northwest and to the South since 2010. The results are expected to provide useful information for sustainable urban planning and development in HCMC.
Urban Expansion in Ho Chi Minh City Detected from Landsat Satellite Images
Ho Chi Minh City (HCMC) is one of the largest cities in Vietnam in terms of economic and social development, with a densely populated population. Over the past four decades, the city's urban space has expanded enormously. Urban expansion has a great impact on the city’s environment and infrastructure. This study focuses on exploiting Landsat images from 1979 to 2022 to reveal the urban expansion of HCMC. Firstly, the city’s land cover layers are extracted from Landsat images using the Random Forest Classifier. The land cover layer presents its four types of built-up area, bare-soil, vegetation, and water surface. Secondly, the urban areas are determined from the built-up mask using the spatial filtering technique with a 15 × 15 pixel window in which pixels are labelled as an urban area if the window contains 70% of built-up area. As a result, the urban area increases from 50.6 km2 in 1979 to 738.2 km2 in 2022, occupying from 2.4% to 32.2% of the city’s total area. Moreover, the city was expanded at an average rate of 31.6% from the center and its main development is obviously to the East during the observed period. Additionally, there are two secondary directions to the Northwest and to the South since 2010. The results are expected to provide useful information for sustainable urban planning and development in HCMC.
Urban Expansion in Ho Chi Minh City Detected from Landsat Satellite Images
Lecture Notes in Civil Engineering
Reddy, J. N. (editor) / Wang, Chien Ming (editor) / Luong, Van Hai (editor) / Le, Anh Tuan (editor) / Van Nguyen, Hong (author) / Nguyen, Ngan Truong (author) / Phan, Vu Hien (author)
The International Conference on Sustainable Civil Engineering and Architecture ; 2023 ; Da Nang City, Vietnam
Proceedings of the Third International Conference on Sustainable Civil Engineering and Architecture ; Chapter: 184 ; 1710-1718
2023-12-12
9 pages
Article/Chapter (Book)
Electronic Resource
English
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