【摘要】 数据处理与图件生成是农用地定级中的关键技术,通常由专业定级软件来完成。本文提出在ArcInfo 8系统下,利用其组件在处理空间数据和属性数据方面的功能和优势,特别是ArcM ap组件中集成的VBA二次开发模块,完成定级单元的划分、定级因素因子作用分值的计算、定级因素因子作用分值图的生成以及定级指数的计算等,并以江都市农用地定级为例,加以实证研究。更多还原

【Abstract】 At present,data processing and map compilation,which constitute the key techniques in farmland grading projects,are basically completed by professional software.In this paper,the authors studied the means for performing the main work in farmland grading project under the ArcInfo 8 system.By virtue of the function of ArcInfo 8 in analyzing spatial data and attribute data,especially the VBA developing environment integrated in its ArcMap module,some important tasks can be well accomplished.They include division of grading-cells,computation of the influencing result value of grading factors or sub-factors,compilation of the influencing result map of grading factors or sub-factors,and calculation of the grading indices.The case of farmland grading in Jiangdu city is adopted to support the viewpoint of this paper.更多还原