基于GIS的合肥市中心城区绿地可达性分析评价

为对合肥市中心城区(二环内)绿地进行可达性分析,并提出优化建议,在遥感(RS)和地理信息系统(GIS)技术支持下,运用景观可达性的概念与原理,建立城市绿地可达性模型,采用费用加权距离方法,结果表明:1)绿地破碎化较为严重,但绿地可达性总体较好;2)绿地可达性的空间格局仍存在不均衡;3)一环内外绿地可达性存在明显差异;4)城市绿地可达性分析是衡量城市绿地服务功能社会公平性的有力手段,充分体现城市建设"以人为本"的理念。因此,城市绿地可达性分析结果能有效地评价城市绿地格局和服务功能,可为合理调整与设计城市绿地系统提供科学依据。

GIS-based analysis and evaluation for the accessibility of urban green in the central city of Hefei

Based on the concept and principle of landscape accessibility, the urban green space reachability model was established with remote sensing (RS), geographic information systems (GIS) technology and a cost weighted distance analysis (in "Spatial Analyst "module of ARCMAP) for Hefei town center.The recommendation was proposed as well.The results showed that 1) Green space fragmentation was serious, but the accessibility of urban green spaces was overall appropriate.2) The urban green space accessibility was still not balanced and unreasonable.3) The Green accessibilities inside and outside the downtown were significantly different.4) The accessibility was an important indicator to weight the social equity of urban greenspace, which was an indicator for the satisfactionof all inhabitants.Accessibility analysis of urban green space could effectively evaluate the pattern of urban green space and services, and provided with a scientific basis for designing and adjusting reasonable urban green space system in Hefei.