METHOD FOR MANUFACTURING DIGITAL MAP BY AMENDING GLOBAL POSITIONING SYSTEM COORDINATE, ESPECIALLY RECORDING UNDERGROUND FACILITY ON DIGITAL MAP BY REDUCING ERROR OF GPS COORDINATE

摘要

PURPOSE: A method for manufacturing the digital map by amending a global positioning system(GPS) coordinate is provided to record the underground facility on the digital map by reducing the error of the GPS coordinate through introducing the reference coordinate. CONSTITUTION: A method for manufacturing the digital map by amending a global positioning system(GPS) coordinate includes the steps of: obtaining the coordinates of a plurality of underground facilities(210-250); integrating the obtained coordinates with reference to one reference point(200); and manufacturing the digital map by applying the integrated coordinates.