In this example there are two surveyors, Surveyor A and Surveyor B. Both surveyors have the same two jobs to complete, Job 1 and Job 2. Each job takes 30 minutes to walk around all the required points. The jobs are spaced 35 km apart.
Surveyor A is using a Leica GPS1200 Rover and a GSM or GPRS (Internet) mobile phone to receive RTK corrections from SmartNet. Surveyor A takes the following steps to complete Job 1 (Fig. 4):
Surveyor A then repeats steps 1 6 for Job 2 (Fig. 5) with the final step of driving back to the office.
Figure 4: Surveyor A completing Job 1
Figure 5: Surveyor A completing Job 2
Surveyor B is using a base station and rover pair with CDMA or GPRS mobile phones for the communication link. Surveyor B takes the following steps to complete Job 1 (Fig. 6):
Surveyor B then repeats steps 1 12 for Job 2 (Fig. 7) with the final step of driving back to the office.
Surveyor B could also choose to leave the base station setup at Job 1 and carry on to Job 2 (Fig. 8).
In this case, by increasing the distance between the rover and the reference to 35 km, there would be an associated decrease in accuracy of the rovers computed position. Therefore, Surveyor B would be sacrificing accuracy in favor of saving time on the setting up of the base station. Surveyor B would also have the additional step of collecting the base station before returning to work.
Figure 6: Surveyor B completing Job 1
Figure 7: Surveyor B completing Job 2
By not needing to setup a base station, Surveyor A had a lot less work to do in the field than Surveyor B. In addition, Surveyor A avoided potential risks such as:
By using SmartNet Surveyor A could achieve consistent accuracy for both jobs, as well as dramatically increased his productivity.