The study of multi-dimensional expansion of urban space(MEUS) addresses the laws of urban spatial expansion from all directions and angles. Using Nanjing as an example,this paper constructs multi-temporal, urban three...The study of multi-dimensional expansion of urban space(MEUS) addresses the laws of urban spatial expansion from all directions and angles. Using Nanjing as an example,this paper constructs multi-temporal, urban three-dimensional models based on RS and GIS technology and then conducts qualitative and quantitative analysis of MEUS using plot ratio change maps and MEUS quantitative index for built-up areas. Based especially on the concept of volume growth contribution rate, this paper analyzes the characteristics of MEUS in different stages. The results show that in 2000–2004, planar expansion played the main role,the internal potential development(IPD) intensity of the urban built-up areas was relatively large, and the volume growth contribution rate was low; in 2004–2008, planar expansion accelerated, and IPD slowed down; in 2008–2012, planar expansion slowed while IPD intensity increased; the contribution rates of volume growth of urban IPD for the three periods were 22.21%, 24.51% and 73.38%, respectively. This study expands the research perspective of urban spatial expansion, and the adopted methods are instructive and meaningful for MEUS research. In addition, the results of this study will deepen the understanding of MEUS laws and help improve scientific decision-making for urban planning and urban land use management.展开更多
在城市建设用地日益紧张的背景下,低效用地再开发已成为城市发展建设的重要选择。本文融合地理信息数据资源和自然资源管理相关数据,在地块尺度将建设用地节约集约评价与低效用地识别结合,从低效用地主导因素出发,运用单因素集成评价方...在城市建设用地日益紧张的背景下,低效用地再开发已成为城市发展建设的重要选择。本文融合地理信息数据资源和自然资源管理相关数据,在地块尺度将建设用地节约集约评价与低效用地识别结合,从低效用地主导因素出发,运用单因素集成评价方法,从规划符合度、建筑特征、建筑强度、利用效益四个递推层级逐项判别,快速识别出低效用地再利用POI数据测算低效用地再开发潜力。通过ArcGIS Model Builder工具搭建快速评价应用模型,并以呼和浩特赛罕区、新城区中心城区为研究区进行应用,共识别出该区域各类低效住宅用地共10.65km^(2),经过卫星遥感影像以及百度街景验证发现整体识别效果较好。该方法可以快速初步识别地块尺度低效用地,可以辅助低效用地外业调查,管理部门衡量当前建设用地利用现状,并为再开发工作提供支持。展开更多
基金National Natural Science Foundation of China,No.41871178,No.41671385,No.41371172
文摘The study of multi-dimensional expansion of urban space(MEUS) addresses the laws of urban spatial expansion from all directions and angles. Using Nanjing as an example,this paper constructs multi-temporal, urban three-dimensional models based on RS and GIS technology and then conducts qualitative and quantitative analysis of MEUS using plot ratio change maps and MEUS quantitative index for built-up areas. Based especially on the concept of volume growth contribution rate, this paper analyzes the characteristics of MEUS in different stages. The results show that in 2000–2004, planar expansion played the main role,the internal potential development(IPD) intensity of the urban built-up areas was relatively large, and the volume growth contribution rate was low; in 2004–2008, planar expansion accelerated, and IPD slowed down; in 2008–2012, planar expansion slowed while IPD intensity increased; the contribution rates of volume growth of urban IPD for the three periods were 22.21%, 24.51% and 73.38%, respectively. This study expands the research perspective of urban spatial expansion, and the adopted methods are instructive and meaningful for MEUS research. In addition, the results of this study will deepen the understanding of MEUS laws and help improve scientific decision-making for urban planning and urban land use management.
文摘在城市建设用地日益紧张的背景下,低效用地再开发已成为城市发展建设的重要选择。本文融合地理信息数据资源和自然资源管理相关数据,在地块尺度将建设用地节约集约评价与低效用地识别结合,从低效用地主导因素出发,运用单因素集成评价方法,从规划符合度、建筑特征、建筑强度、利用效益四个递推层级逐项判别,快速识别出低效用地再利用POI数据测算低效用地再开发潜力。通过ArcGIS Model Builder工具搭建快速评价应用模型,并以呼和浩特赛罕区、新城区中心城区为研究区进行应用,共识别出该区域各类低效住宅用地共10.65km^(2),经过卫星遥感影像以及百度街景验证发现整体识别效果较好。该方法可以快速初步识别地块尺度低效用地,可以辅助低效用地外业调查,管理部门衡量当前建设用地利用现状,并为再开发工作提供支持。
