Delineation of the Urban-Rural Boundary through Data Fusion: Applications to Improve Urban and Rural Environments and Promote Intensive and Healthy Urban Development.

This is mainly reflected in an obvious trend: a decreasing number of POI agglomerations from the urban area to the rural fringe, which is also why POI is mainly applied in the identification of urban centers [ 33 ], delineation of urban functional areas [ 34 ], extraction of urban built-up areas [ 35 ], and the delineation of urban–rural boundaries.

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