They differ somewhat from bathymetric charts which are virtually topographic maps of the ocean floor .
们与水深图稍有不同,后者实际上是洋底地形图。
Precise bathymetric charts and sea floor vegetation distributions can be generated for optically shallow waters .
在浅水水域,用光学仪器可以进行精确的海底地形图绘制和海底植被分布。
Upon acceptance , the contractor shall submit two digital copies in autocad or equivalent approved one full-size original copy and six printed copies of the relevant as-built drawings , bathymetric and topographic surveys to the engineer .
This paper introduces the research on supervision technology of bathymetric survey , which has been applied successfully to the acceptance survey of dredging project .