METHOD FOR MAKING GIS HAVING 3D COORDINATE SYSTEM USING GPS AND MARKER STONE

摘要

PURPOSE: A method for making a GIS(Geographic Information System) having a 3D(Dimensional) coordinate system using a GPS(Global Positioning System) and a marker stone is provided to offer accurate 3D coordinate system data by defining a GPS error function between the coordinates from the GPS and the marker stone, and calibrating the GPS coordinates with application of the error function. CONSTITUTION: The 3D coordinate values of a position placing the marker stone are obtained(S10). The coordinate values of the position placing the marker stone are obtained from the GPS by moving a vehicle equipped with the GPS to the position of the marker stone(S20). The GPS error function is obtained from the coordinate values obtained the marker stone and the GPS at the marker stone(S30). The coordinate values of each position are obtained by moving the vehicle to each position of a road(S40). Abnormality of the coordinate values is checked for each position(S50). Calibrated coordinate values are obtained by calibrating the coordinate values of each position with the GPS error function(S60).