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收稿日期:2010-8-30;改回日期:2010-9-30。
基金项目:安徽省自然地理学重点学科(AH021);安徽省自然科学基金项目(090415212)
作者简介:鲍伟佳(1986- ),男,安徽南陵人,硕士研究生,主要从事地理信息系统软件开发与应用研究。E-mail:ric_bob@163.com
通讯作者:程先富(1967- ),男,安徽合肥人,教授,博士,主要从事农业资源与信息技术的教学与研究工作。E-mail:xianfucheng@sina.com