What is a total station survey instrument?
What is a total station survey instrument?
A total station is an optical surveying instrument that uses electronics to calculate angles and distances. It combines the functions of a theodolite with that of a transit level and electronic distance meter (EDM).
How do you survey a total station?
Turn the total station to zero degrees on the horizontal axis. Position a reflection in the line of sight of the device. Using the EDM functionality, move the reflector until it is the correct distance away from the instrument. This is the point of the coordinates entered into the system.
How do you measure total station accuracy?
Distance measurement Most total stations use purpose-built glass prism (surveying) reflectors for the EDM signal. A typical total station can measure distances up to 1,500 meters (4,900 ft) with an accuracy of about 1.5 millimeters (0.059 in) ± 2 parts per million.
How do you backsight a total station?
MAGNET Field: Occupy Backsight Setup
- Set Instrument over the control point.
- Measure the instrument height.
- Launch MAGNET field.
- Connect to instrument.
- Set the Prism Rover over the other control point.
- In MAGNET field go to SET UP > Backsight.
What is reiteration method in surveying?
Method of reiteration for measurement of horizontal angle is usually adopted in case several angles of well-distributed points/ objects are to be measured from the same instrument station with high precision. In this method, angles are measured successively starting from a point termed as an initial station.
How do you run a total station?
- Step 1: Gather the Survey Equipment, Stake, and Tools.
- Step 2: Establish a New Temporary Benchmark.
- Step 3: Set-up the Tripod.
- Step 4: Attach the Tribrach and Coarse Level the Tripod Over the Benchmark.
- Step 5: Continue to Level and Adjust the Tribrach As Necessary.
- Step 6: Set the Instrument on the Tripod.
How do surveyors measure distance?
To measure distances, land surveyors once used 100-foot long metal tapes that are graduated in hundredths of a foot. To measure the horizontal distance between two points, one surveyor uses an EDM instrument to shoot an energy wave toward a reflector held by the second surveyor.
Which is more accurate GPS or total station?
GPS receiver based systems are ideal for larger jobsites, and accuracy requirements of 8 millimeters (0.03 feet). Total Station based systems provide the highest possible degree of accuracy for site positioning, stakeout, grade checking and measurement.
Which is the latest development in total station?
Which is the latest development in a total station? Explanation: Nowadays, robotic total stations are available. They can be operated from a distance via remote control. It eliminates the need for an assistant staff man.
What is backsight in total station?
Backsight Setup. In order to measure points with the total station, the instrument needs a projection model that measures the distance of points based on the angle difference of an initial reference point in an Azimuth “heading”. This is called backsight point. Backsight defines the orientation of the coordinate system …
What is TBM level?
Temporary Bench Mark (TBM) – a point of known height above a pre-defined level. The height of any target point is referred to as Reduced Level (RL), because it is reduced to a known datum.
How often should a total station be checked?
A Total Station should be checked at least once a month or before any precise work is to be carried out. What checks need to be carried out on a total station? 1) Plate Bubble Check.
How big is a total station surveying instrument?
Data collected and processed in a Total Station can be downloaded to computers for further processing. Total station is a compact instrument and weighs 50 to 55 N. A person can easily carry it to the field.
How is total station used in civil engineering?
Total station is a surveying equipment combination of Electromagnetic Distance Measuring Instrument and electronic theodolite. It is also integrated with microprocessor, electronic data collector and storage system. The instrument can be used to measure horizontal and vertical angles as well as sloping distance of object to the instrument.
How can I Check my total station accuracy?
3) Release the retaining screw slightly and carefully turn the tribrach through 120 degrees keeping within the marks on the tripod. Re-level and sight the cross and note if the cross is not in the centre. 4) Repeat, turning through a further 120 degrees. The cross should be central each time.