测绘工作是社会主义经济建设的一个组成部分。水利部门的测绘工作是为水利建设和江河湖海的开发利用提供必要的测绘资料的。多年以来,水利部门积累了大量与水域有关的测绘科技档案。这些档案不仅可供本系统使用,对其他建设部门也有 Surveying and mapping work is an integral part of the socialist economic construction. The surveying and mapping work of the water conservancy department is to provide necessary surveying and mapping materials for water conservancy construction and the development and utilization of rivers, lakes and seas. Over the years, the water conservancy department has accumulated a large number of water-related surveying and mapping technology files. These files are not only available for this system, but also for other construction departments