METHOD AND SYSTEM FOR SURVEYING TOPOGRAPHY OF SEABED

摘要

PROBLEM TO BE SOLVED: To represents the seabed with an extremely high accuracy by adding a precise time lag measured by UTC time (universal time convention) to the rolling or azimuth data of survey boat and determining the topography of seabed by synchronizing these data entirely. SOLUTION: In the inventive method and system for surveying the topography of seabed, the coordinate position of a sonar depth gauge being set in a survey boat is obtained, along with the measuring time thereof, based on GPS signals received from satellites and stored. Seabed depth information from the sonar depth gauge and rolling information of the boat from a rolling sensor of the survey boat are added with a precise time lag determined with reference to a timing pulse of UTC time obtained through GPS and stored. Coordinate position of the sonar depth gauge is then operated along with the seabed information and the rolling information at a time closest to the measuring time thereof and the topography of seabed is displayed.