Urbanization change in Ho Chi Minh city from 1990 to 2022 detecting using satellite imagery

Abstract

After the Liberation day on the 30th April 1975, for three decades, Ho Chi Minh city has been through an urbanization process splitted into two phases. From 1976-1985, the city focused on post-war recovery, the infrastructure of the city was consolidated, and urbanization was low in this phase. After 1986, with the assistance of Russia, Ho Chi Minh city became a huge economic center, attracting an enormous number of immigrants for jobs and residence. Nowaday, Ho Chi Minh city has the top urbanization rate in Vietnam. Beside bringing economic growth, creating a premise for improving people's quality of life and developing the country, urbanization has left bad influences on the city infrastructure and environment. Against that backdrop, urbanization management became important. Since the 1980s, remote sensing applications have been very popular in urban planning. It has been proved that a remote sensing dataset has more information of earth surface than usual urban map. Presently, remote sensing technology has developed in sensors, laser scanning data mining and advanced image processing, it is more widely used in urban area management. Being the very first step in the process of urbanization management and finding solutions for the effect of it, this study goal is to detect the change of built up area covered in Ho Chi Minh city from the 1900s to now, using remote sensing technology and machine learning algorithms.