Compared with traditional control m

Compared with traditional control measurement, GPS-RTK measurement has the advantages of high efficiency and less error accumulation (there is no error accumulation between the flow stations), and is widely used in some control measurement with low precision requirements.② Application of GPS RTK in the measurement of broken partsGPS-RTK can be used to measure the broken parts of topographic map without root control, and directly measure the broken points according to some reference points distributed in the survey area. After the reference station is set and necessary known data (reference point coordinate, reference point coordinate, etc.) is input, the measurement of the broken part can be carried out.GPS-RTK crushing measurement is different from the personnel of traditional total station measurement. At least 3 people in a working group are measured by traditional total station. GPS-RTK measurement only requires one person and another person is able to guard the benchmark station. When the traditional total station is measuring 1:1000 topographic map, it can measure about 800 points a day (only half of the difficult areas), while GPS-RTK can measure more than 1200 points a day, which greatly improves the measurement efficiency. At the same time, RTK measurement can be carried out all day long, and it can be measured by multiple mobile stations at the same time, and the efficiency can be doubled. While a group of traditional total station can run mirrors by more than one person, only one person can operate the instrument, so the speed increase is limited. In addition, the traditional total station mapping needs to be moved frequently, which consumes a lot of time. GPSRTK measurement is not affected by the ground objects between the reference station and the mobile station. After a reference station is set, any broken point can be collected within 10 km radius (on the premise that more than 4 GPS satellites can be observed).