GEOGRAPHIC INFORMATION SYSTEM MEASURING BASIS ERROR BY MOVABLE GPS

摘要

A geographic information system for measuring error of a reference distance through a mobile GPS(Global Positioning System) device is provided to correct visual error of aerial photographing, thereby accurately displaying an actual location on a GPS coordinate. A base(110) fixes a GPS device(100) on the ground. A body(120) is settled on the base. An arm(130) is drawn out in 4 directions around the body. A head(140) is comprised around the arm to measure a withdrawal distance of the arm.