Under the condition of re-observation, the relative errors of measuring area with the pocket GPS could reach 2.0% , which could meet the precision demand of measuring area in forestry practice.
The GPS observation shows that the relative motions between the blocks in North China have dynamic variation.
GPS观测结果显示: 华北地区各块体间的相对运动存在动态变化。
3
The process of relative positioning using the GPS module, under the schedule of C/OS-II operating system, is analyzed, with a brief introduction to the display interface of the network status.