作　　者： ; ; ;

机构地区： 中国科学院地理科学与资源研究所

出　　处： 《资源科学》 2002年第6期12-17,共6页

摘　　要： 土地资源调查中 ,线状地物面积扣除是影响地类面积汇总统计精度的一个重要因素 ,也是土地资源数据库中比较难解决的问题。该文从线状地物面积扣除方法的可操作性、面积扣除精度、地类面积汇总统计精度、数据冗余度、数据管理等角度分析了常规线状地物面积扣除方法 ,在此基础上 ,提出了基于缓冲区的线状地物面积扣除方法。探讨了基于缓冲区的线状地物面积扣除方法中线状地物缓冲区的创建、缓冲区误差处理、线状地物面积扣除的具体实现方法 ,并与常规线状地物面积扣除方法对比 。 Linear-Object Area Subtraction is an important factor in area statistics of land resources investigation, and this is a thorny problem when developing county-level land resources investigation information system. In this paper, with consideration to maneuverability, precision of area subtraction and data management, the author analyzed the general linear-object area subtraction method which stored the length, width and coefficient for subtracting linear area from polygon, and also stored the spatial-relation between polygon-object and it's related linear-objects. Then a new linear-object area subtraction method based on buffer Zone is provided and the realization of subtraction and the accuracy of Linear-object area subtraction is analyzed, compared with general linear-object area subtraction. At last, it is concluded that the methodology based on buffer zone has strong maneuverability, high accuracy, and convenient for management, therefore, it is a perfect way to solve the problem of linear-object subtraction in Land Resources Database.

关 键 词： 数据库 缓冲区 线状地物 面积扣除 土地资源调查

领　　域： [经济管理]