基于联合测绘数据源的大比例尺地形图动态更新

Dynamic updating method of large-scale topographic map based on joint surveying and mapping data source

大比例尺地形图作为基础地理信息数据的重要组成部分,为城市建设与发展提供基础性保障服务。随着城市信息化进程不断加快,各行业、各领域对基础地理信息数据的现势性要求越来越高。本文以珠海市为例,提出一种基于联合测绘数据源,按需提取联合测绘成果中高精度、强现势性的大比例尺地形图数据,对城市基础地形数据库进行动态更新的方法。结果表明:此方法不但能够大幅缩短基础地理信息数据的更新周期,提高现势性,而且可以有效地避免重复测绘,降低成本。

As an important part of basic geographic information data,large-scale topographic map provides basic guarantee services for urban construction and development.With the accelerating process of urban informatization,all industries and fields have higher and higher requirements for the current situation of basic geographic information data.Taking Zhuhai city as an example,this paper proposed a method to dynamically update the urban basic terrain database by extracting high-precision and highly current large-scale topographic map data from the joint surveying and mapping results on demand with the joint surveying and mapping data source.The results showed that this method could not only greatly shorten the update cycle of basic geographic information data,improve the current situation,but also effectively avoid repeated mapping and reduce costs.