| 摘要 |
PURPOSE: A system for correcting a location of a topographic map image is provided to minimize errors in a downtown by checking a location of a location measuring device through ultrasonic waves between location measuring devices. CONSTITUTION: A light gun(151) irradiates laser light. An ultrasonic wave originating device(170) originates an ultrasonic wave. A plurality of sensing modules(161) senses the ultrasonic wave. A plurality of light receiving modules(162) senses the laser. A control device(140) stores an originating location of the ultrasonic wave through angles and RSSI(Received Signal Strength Indication) of the ultrasonic wave and the laser light. An image drawing device updates a drawing image with the data. |
