| 摘要 |
PURPOSE: A precise image drawing system based on an aerial photography image for producing a digital map image is provided to improve the accuracy and reliability of the digital map by respectively measuring coordinate information of a changed geographic feature on the ground by using a GPS, a LBS, and a INS, and renewing the coordinate information through an arithmetic mean calculation. CONSTITUTION: When loaded information is set on a time control, an actual vehicle measurement unit analyzes elapsed time information(S8200,S8300). A control unit controls the driving direction of a step motor unit on a set time basis(S8400). In case the loaded information is set on a distance control, the actual vehicle measurement unit analyzes moving distance information(S8500). The control unit controls the driving direction of the step motor unit on a set distance basis(S8600). The control unit analyzes a received GPS signal(S8700). The control unit generates first coordinate information through an arithmetic mean computation(S8800). [Reference numerals] (AA) Start; (BB) Time control; (CC) Distance control; (DD) End; (S8100) Loading an operating parameter; (S8200) Controlling time and distance?; (S8300) Analyzing elapsed time information; (S8400) Controlling the driving direction of a step motor on a set time basis; (S8500) Analyzing moving distance information; (S8600) Controlling the driving direction of the step motor unit on a set distance basis; (S8700) Analyzing a signal of first to third GPS receivers with values of moving direction, moving speed, longitude, latitude and altitude; (S8800) Generating first coordinate information through arithmetic mean computation and cryptographic conversion; (S8900) Transmitting the encrypted average coordinate information and image signal to an image drawing server through mobile communications in real time |
