【摘要】 在江苏宜兴丁蜀镇土地质量地球化学等级评价中,以当地的土地利用类型图(层)为基础,采用图层交叠分析和Voronoi图相结合的方法,对评价单元作了进一步的划分,并确定了各单元的控制样点。取得了样点与控制单元之间的良好对应效果。概述了部分相关空间分析的算法。更多还原

【Abstract】 Located in southeast of Yixing City,Jiangsu Province,Dingshu is a famous town of pottery wares.In order to meet the requirements of local land evaluation,the author and other members of the working team collected 2 453 soil samples on the cultivation layer.The sampling spots were arranged in accordance with the distribution of varied land sorts on land utilization type map and the density requirements of the study.In the course of the grade evaluation of land quality geochemistry,the author adopted the methods combining map layer folding analysis and Voronoi diagram,based on the sort map of local land utilization,fixed the controlling sample spots of each unit,achieved a fine corresponding effect between samples and controlled spots.In addition,the author depicted briefly some of the algorithm on spatial analyses.更多还原