城镇开发边界划定与用地集聚优化

Land Agglomeration Optimization for Delimitation of Urban Development Boundary

针对多因子叠置获得的城乡建设用地适宜性结果呈现破碎性,无法直接指导城镇开发边界划定的问题,提出运用移动格网法进行破碎用地集聚优化,以实现自动化划定城镇开发边界。该文从生态视角出发,整合ArcGIS中的空间分析方法,集成移动格网法。在确定生态安全格局、构建同化模型进行近似计算、确定空间特征研究尺度、替换小格网数据以生成矢量边界、归整建设和生态用地及小格网再次确界使边缘精细化等修正图像的方式,最终确定形态。以福建长汀南部新区为实证研究,从集中建设角度出发,对比分析同等场景下蚁群算法结果。结果表明,2种方法相互佐证,二者集成模型补充和完善了现有划定城镇开发边界的模型和方法。

The suitability results of urban and rural construction land obtained by multi-factor superposition are fragmented,and it is impossible to directly guide the problem of urban development boundary demarcation.It is proposed to use the mobile grid method to optimize the agglomeration of crushed land to realize the automatic demarcation of urban development boundary.Mainly from the ecological perspective,it integrates the spatial analysis method in ArcGIS and integrates the mobile grid method.In the way of determining the ecological security pattern,constructing the assimilation model for approximate calculation,determining the scale of spatial characteristics research,replacing the small grid data to generate vector boundary,reorganizing the construction and ecological land,and refining the edge of the small grid,the final shape is determined.Taking the southern part of Changting,south of Fujian,as an empirical study,from the perspective of centralized construction,the results of ant colony algorithm in the same scenario are compared and analyzed.The results show that the two methods support each other,and the integrated models complement and improve the existing models and methods for delineating urban development boundaries.