基于GIS的水下地形矢量数据质量检查方法探讨

Researching on the Methods of Censoring the Underwater Topographic Vector Data Based on GIS

本文以南京长江河道的水下地形数据数字化为例,通过对数字化数据质量的检查,分析了影响数据质量的主要因素—拓扑错误,并设计了批量检查修改拓扑错误的算法。通过设计开发针对高程属性检查的数据质量检查软件,提高数据质量检查的效率,保证数字化水下地形数据的质量。

Taking the underwater topographic vector data of the Yangtze river in Nanjing as an example,this article examined the quality of vector data,analyzed topographic error — the main factor that affected the data quality and designed the algorithm for modifying a batch of topographic errors.This software is designed for examining the attribute of elevation,which improves the efficiency of examining the data quality and guarantees the quality of digitized underwater vector data.