METHOD FOR MAKING ELECTRONIC NAUTICAL CHART BY MEASURING THE SUBMARINE TOPOGRAPHY

摘要

According to an embodiment of the present invention, a method for manufacturing an electronic chart by topography and depth survey of the ocean includes (a) installing an acoustic altimeter including a gyro sensor and a topography measuring device including a laser light source in an ocean surveying vessel to investigate the area to be investigated simultaneously surveying the water depth and coastal topography of (b) converting the corrected water depth data and coastal terrain data into three-dimensional coordinate data composed of a latitude value, a longitude value, and a water depth value using a preset coordinate transformation system; (c) estimating second coordinate data for a specific point located inside the triangle by using at least three pieces of first coordinate data constituting a triangle among the three-dimensional coordinate data; and (d) generating an electronic chart of the survey target area by adding the numerical topographic map data provided by the National Geographical Information Service to the three-dimensional coordinate data and the estimated second coordinate data.