Comparison of Three Maps at Multiple Resolutions: A Case Study of Land Change Simulation in Cho Don District, Vietnam
Comparison of Three Maps at Multiple Resolutions: A Case Study of Land Change Simulation in Cho Don District, Vietnam
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DOI：
10.1080/00045608.2010.517742
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发表时间：
2011-01-01
期刊：
影响因子：
--
通讯作者：
Castella, Jean-Christophe
中科院分区：
文献类型：
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作者：
Pontius, Robert Gilmore, Jr.;Peethambaram, Smitha;Castella, Jean-Christophe
地理建模人员经常将观察到的土地过渡图与模拟土地过渡图进行比较，以将参考图中的模式与模拟模型的输出相关联。在单一分辨率下对栅格地图进行逐像素分析对于单一比例尺的这项任务很有用，但科学家通常需要考虑其他比例尺。本文提出了满足这一需求的方法，提出了一种多分辨率方法来比较三个地图中的土地类别：时间1的参考地图，时间2的参考地图和时间2的模拟地图。该方法生成一个三维表格，该表格给出了在地图的原始分辨率和几组嵌套的较粗正方形下每个类别组合的研究区域的百分比。该方法区分粗方格内分配不一致、粗方格间分配不一致、数量不一致和一致。我们说明了从1990年至2001年使用32米分辨率的像素，越南乔唐区的桑巴舞代理为基础的模型运行的输出的方法。结果表明，总体分歧的一半是由于广场内的分配分歧是506米x506米，这是一个村庄的平均大小。其余的分歧大部分是森林和灌木之间的分配不当的北方和南部地区，这是由数据和模拟之间的差异，从作物和灌木类别的过渡。
Geographic modelers frequently compare maps of observed land transitions to maps of simulated land transitions to relate the patterns in reference maps to the output from a simulation model. Pixel-by-pixel analysis of raster maps at a single resolution is useful for this task at a single scale, but scientists often need to consider additional scales. This article presents methods to satisfy this need by proposing a multiple-resolution method to compare land categories in three maps: a reference map of time 1, a reference map of time 2, and a simulation map of time 2. The method generates a three-dimensional table that gives the percentage of the study area for each combination of categories at the maps' native resolution and at several nested sets of coarser squares. The method differentiates allocation disagreement within coarse squares, allocation disagreement among coarse squares, quantity disagreement, and agreement. We illustrate the method with output from a run of the SAMBA agent-based model from 1990 to 2001 using 32-m resolution pixels for Cho Don District, Vietnam. Results show that half of the overall disagreement is attributable to allocation disagreement within squares that are 506 m x 506 m, which is about the average size of a village. Much of the remaining disagreement is misallocation of forest and shrub between the northern and southern parts of the district, which is caused by differences between the data and the simulation concerning transitions from the crop and shrub categories.