海底测量 meaning in Chinese

subsea survey

The digital map is usually formed by the water depth ' s database measured on the seabottom . because of the disadvantage that the database is kept secret , this dissertation introduces a new method : first , the depth data are picked up from the electronic chart , then interpolation of the depth datum by kriging algorithm is adopted to gain the digital map . the method is the precondition of the terrain matching when it is researched by simulation , and it is the complement of the database
通常数字地图都是通过海底测量的海底水深数据库来形成，针对水深数据库存在保密性等特点，本文提出了一种从电子海图提取水深数据，然后采用kriging方法进行插值形成数字地图的方法，该方法是进行地形匹配仿真研究的前提，而且它也是海底水深数据库的一个补充。