To review observation residuals and setup results

Use the observation residual information shown after a station setup plus or resection to review the quality of the observations and remove poor observations. A residual is the difference between the known position and the observed position of the backsight point(s).


  • During a station setup plus or resection, no observations are stored to the job until you store the station setup.
  • A foresight point that does not yet exist in the database has null residuals in the Residuals screen.

To view the standard deviations of the observations for each point, tap Std Dev. The Std Dev softkey is available only after all rounds are complete.