一、数据库建立的目的与意义森林抽样调查样地蓄积量,是森林资源清查中的重要原始数据,也是资源统计的数字基础。样地的蓄积量计算和总体精度计算,过去由于条件所限,只靠人力一株一株地查算,耗时费力,查算的准确性也很差。样地蓄积量一但出错,便产生链锁反应,资源统计工作就要出现反复,从而要大大增加统计工作量。建立数据库,是将大量材积表存贮在电子计算机的外存贮器——磁盘里,借助于RDOS支持下的BASIC文件系统,用枚举分类法和顺序查找法,实现对样地的每木检尺数据 First, the purpose and significance of the establishment of the database Sample size of forest sampling accumulation of forest inventory is an important source of raw data, but also the digital basis for resource statistics. The plot calculation and the overall accuracy calculation of the plot, in the past due to limited conditions, rely on human strain one by one to calculate, time-consuming and difficult, the accuracy of the check is also poor. Once the sample plotted amount has gone wrong, a chain reaction will occur, and the resource statistics work will be repeated, which will greatly increase the statistical workload. The establishment of the database, is a large volume of tables stored in the computer’s external memory - disk, with the help of RDOS BASIC file system, with the enumeration of taxonomy and the order of search method to achieve the plots of wood Check the data