元阳县土地利用空间格局及其变化的图谱方法研究

Research on the Tupu Methods of Land Use Spatial Pattern and Its Change of Yuanyang County,Yunnan Province

信息图谱为区域土地利用空间格局及变化提供了一种谱系化、定量化与定位化相结合的研究方法。以云南省元阳县为例,在遥感、GIS空间分析和统计分析模型的支持下,从土地利用时空演变模式、空间扩展过程、斑块的空间分布特征三方面建立土地利用空间格局及变化信息图谱,并对其图谱特征进行分析。结果表明:土地利用时空演变征兆图谱更直观形象地揭示了区域土地利用变化的基本模式,提供了时空复合的表达方式;土地利用斑块形态与空间扩展图谱的建立应用空间格局研究中的相关概念和方法,将微观、宏观层次的图形信息与变化过程相结合;利用等步长变距离缓冲区分析法建立的VCM曲线可直观地描述不同土地利用类型斑块的空间分布特征及不同研究时段内其空间分布特征的变化情况。

Information Tupu provides a research method in the combination with spectrum, quantification and orientation for the regional land use spatial pattern and change. Taking Yuanyang County in Yunnan Province as an example, based on remote sensing, GIS spatial analysis and statistical analysis model, this paper establishes the in- formation Tupu of land use spatial pattern and its change from the following three aspects ： land use spatio-temporal change mode, the expansion process of space, and landscape characteristics. Then it analyzes the characteristics of these Tupu. The results show that ： （ 1 ） The established land use spatio-temporal change premonition Tupu is more visually revealing the basic modes of land use change in the study regions, including the quantitative and structural changes of various land use types. （2）Through establishing mathematical models to analyze the expansion intensity and expansion patterns of various land use types, the land use spatial expansion process can be visualized, abstract- ed, and modeled, which has a certain theoretical research value for understanding the internal mechanism of spatial changes and then predicting the future land use changes. （3） The curve of variable distance buffer analyzing meth- od can declare clearly the spatial distribution of patches by measuring the connectivity and concentration of patches.