基于ArcGIS ModelBuilder的LUCC转移矩阵自动计算模型研究

A study of LUCC transfer matrix automated computation model based on ArcGIS ModelBuilder

作为描述土地变化转移总体结构与数量的基础性模型,转移矩阵已广泛应用于土地利用/覆被变化领域。现有文献大多直接给出所研究区域的LUCC转移矩阵计算结果,但很少讨论分析其具体计算方法与步骤。针对这一情况,文中在界定总结转移矩阵概念和性质的基础上,详细描述ArcGIS平台下基于土地利用/覆盖栅格分类数据人工手动计算转移矩阵的过程及工具,并采用ModelBuilder技术通过集成现有工具设计实现一个转移矩阵自动批量计算工具模型。最后,以南京市、郑州市、徐州市三地的土地利用分类数据为例,对常规人工方法和批量自动方法进行对比实验。实验结果表明,所集成设计的批量计算工具平均可缩短计算用时10倍以上,能够有效克服常规人工方法中出现的人机交互频繁、效率低、易出错的不足。

As a basic model to describe the overall structure and quantity of land change transfer,transfer matrix has been widely used in the research field of land use/cover change(LUCC).Most of the existing literatures directly give the LUCC transfer matrix calculation results of the studied area,and few of them discuss its concrete calculation methods and steps.In view of this situation,the concept and properties of transfer matrix are firstly defined and summarized in this paper.And then,the process and tools of manual calculation of transfer matrix under ArcGIS platform using land use/cover raster classification data are describes in detail,and the ModelBuilder technology are adopted to implement a batch automatic calculation tool model of transfer matrix by integrating these existing tools.Finally,taking the land use classification data of Nanjing,Zhengzhou and Xuzhou as examples,the conventional manual method and the batch automatic method are compared and tested.The test results show that the designed batch computing tools can averagely shorten the calculation time by more than 10 times,and effectively overcome the shortage of the manual method,such as frequent human-computer interaction,low efficiency and being error-prone.