基于FME的地形图入库快速构面方法研究

Research on Rapid Polygon Forming Method in Topographic Map Storage Based on FME

为减少CASS格式地形图入库工作中地物要素构面的工作量,基于FME数据处理平台,研究了地物要素快速构面的方法。将面要素分为规则要素和不规则要素两类,针对前者设计数据处理算法,使大部分构面工作由计算机自动完成;针对后者提出“面减”“面加”相结合的人工构面方式,降低工作难度。数据测试结果与工作实践表明,该方法自动构面准确率高、人工构面简单易行,有效提高了构面工作效率,减少了操作人员的劳动强度。

In order to reduce the working intensity of polygon forming in topographic map storage in CASS format,we studied a rapid polygon forming method based on FME data processing platform.The polygon features are divided into regular features and irregular features.For the for-mer,we designed a data processing algorithm so that most of the polygon forming work could complete automatically by the computer.For the latter,we proposed a manual polygon forming method combining“polygon subtraction”and“polygon addition”to simplify the difficulty of work.The data test results and work practice show that the method has high accuracy,and the manual operation is simple and easy,which can im-prove the working efficiency,and reduce the working intensity.