Spatial delineation methods of urban areas
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摘要: 科学合理地划定城区范围,是建立城乡统计、制定城乡政策、实施国土空间规划的重要依据。目前尚未建立统一的城区范围概念体系和划定方法,给国土空间规划的编制和实施带来诸多不确定性。因此,针对目前我国城区范围概念不统一、划定方法不一致、空间界线不明确等问题,在广泛调研的基础上,界定了城区范围的空间内涵,并利用测绘地理信息、遥感等技术手段,提出了城区范围的空间划定方法。研究基于第三次全国国土调查数据,依次通过城区用地特征判断和空间连接判断,确定纳入城区的地物,提取城区的空间范围。以巴中市为例进行实证研究,验证了流程的合理性与可行性,证明该方法可用于城区空间范围的提取,具有广泛推广的价值。Abstract: The scientific and reasonable delineation of an urban area serves as an important basis for making urban and rural statistics, formulating urban and rural policies, and implementing land space planning. At present, a unified concept system and unified delimitation methods of urban areas are yet to be established, which brings a lot of uncertainty to the formulation and implementation of land space planning. Therefore, aiming at the problems of the fuzzy concept, inconsistent demarcation methods, unclear spatial boundaries, this paper defined the spatial connotation of urban areas based on extensive research and proposed the spatial delimitation method of urban areas using surveying and mapping geographic information and the techniques such as remote sensing. Based on the data of the Third National Land Survey, this study determined the surface features incorporated into urban areas according to urban land use characteristics and spatial connection successively, in order to extract the spatial scopes of urban areas. Finally, taking Bazhong City as a case study, the rationality and feasibility of the process were verified, indicating that the method can be used in the extraction of the spatial scopes of urban areas and has the value of widespread applications.
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