Urbanization
Accurately defining urban entity boundaries is crucial for analyzing urban expansion trends, understanding the impacts of urbanization on the environment, and planning and achieving sustainable urban development. In recent years, multiple global urban boundary products have emerged. However, cities’ definitions, formation processes, and morphology vary significantly across countries, making it particularly challenging to use a uniform method to delineate urban boundaries.
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China has experienced a rapid urbanization over the past three decades, resulting in a prominent “urban core-suburban-rural” (USR) triad structure of human settlements. The USR disparities, which are related to the spatial variations of human activity intensity, have significant impacts on the spatiotemporal variations in various environmental issues such as carbon dioxide (CO2) emissions, carbon storage, water quality, etc. However, there is a lack of national-level, long-term USR dataset compared to the large number of “Urban-Rural” dual structure datasets.
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