METHOD FOR MANUFACTURING COASTAL FINE-GRID TOPOGRAPHICAL MAP

摘要

A method of making a precise topographic map of a coastal area is disclosed. A method of manufacturing a precise topographic map of a coastal area of the present invention comprises the steps of: a) measuring a tidal range of a coastal area using a tidal measurement means including a tidal elevation system during a period of measuring the depth and topography of the coastal area; b) installing a multi-beam echo sounder and a terrestrial laser instrument with a gyro sensor on the survey vessel; c) simultaneously measuring the depth of the marine area of the coastal area and the terrain of the land area by using the multi-beam echo sounder and the terrestrial laser instrument installed on the survey vessel, and simultaneously obtaining the water depth data and the terrain data of the coast; d) correcting the water depth data and the terrain data according to the movement of the survey vessel using a data processing program using the data of the gyro sensor; e) calibrating the water depth data by the water depth data based on the average sea level using the tide data obtained by precisely measuring the depth and depth of the coastal marine area in step a); f) converting the water depth data and the terrain data corrected in steps d) and e) into WGS84 longitude and latitude coordinates and elevation values of the GRS80 ellipsoid using a coordinate converter; And g) adding data of a digital geographical information source of the terrestrial geographic information source to the three-dimensional accurate terrain data of the coastal area obtained in the step f). According to the invention, it is possible to eliminate the inconvenience of measuring the depth of the coast and the terrain of the land simultaneously at the same time, and it is possible to solve the inconvenience of separately measuring the land and the sea in the coastal area, It is possible to provide an effect that the combining job can be deleted.