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Optical/laser plummet base - permit interchange of equipment with tribrach tribrach (Z is elevation) o All information can be digitally recorded o Can be used to stake-out engineering projects using coordinates o Can measure multiple angles and average the results Displays measurements on liquid crystal displays All total stations have o standards o telescopes  objective lens and focus  eyepiece lens and focus  both lenses must be focused to avoid parallax  define axis of sight o EDM o horizontal axis o vertical axis o levels (many instruments use digital levels today) o keypad o display o battery o angle measurement system  horizontal circle  vertical circle  horizontal and vertical motion screws  lock screw  tangent screw  automatic compensator to correct for mislevelment not on all instruments o collimator - used to roughly sight on target o Communication port

Total Station and Angle Measurements Total Station Instruments Ĭapable of measuring o Angles in both the horizontal and vertical planes, o Slope distances  Can trigonomet rically convert slope distances to their horizontal and vertical components of distances o Can compute XYZ coordinates of points using observations.