Abstract: In order to detect the influence of multipath effects on the real?time kinematic ( RTK) measurement methods, the authors made a real?time dynamic measurement experiment on broad lakes, forests, high?tension lines, observation sight and tall buildings un?der the condition of different elevation angles. The authors first used GPS static measurement to set some observation points and then chose some points as known points, and utilized RTK and total station instrument to observe other points. A comparative analysis of the measured data from the two instruments shows that the terrain affects the measurement work. The authors therefore made some recom?mendations.