What is the difference between resection and intersection?
In resection, the one point with unknown coordinates is occupied and sightings are taken to the known points; in intersection, the two points with known coordinates are occupied and sightings are taken to the unknown point.
What are the three components of total station?
Components of a Total Station It consists of a distance measuring instrument (EDM), an angle measuring instrument (Theodolite) and a simple microprocessor.15 Jun 2019
How do you measure a total station?
Coordinate measurement Angles and distances are measured from the total station to points under survey, and the coordinates (X, Y, and Z; or easting, northing, and elevation) of surveyed points relative to the total station position are calculated using trigonometry and triangulation.
What is included in a total station?
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.9 Nov 2012
How do you orientate a total station?
What is the accuracy of 1 second in total station?
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.
What are the units of total station?
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. Reflectorless total stations can measure distances to any object that is reasonably light in color, up to a few hundred meters.
What does a total station measure?
The total station A total station consists of a theodolite with a built-in distance meter (distancer), and so it can measure angles and distances at the same time. Today’s electronic total stations all have an opto-electronic distance meter (EDM) and electronic angle scanning.
What is the principle of total station?
Principle of Total station The total station consists of a built-in emitter, capable of emitting microwaves and infrared signals. The wavelength of these emitted waves helps in calculating the distance between the points.
What are the components of total station?
A total station is composed of four main components; EDM (Electronic Distance Measurement), electronic theodolite, microprocessor and electronic display.
How do you measure distance in surveying?
Technicians involved in surveying standardize their pace by walking over known distances on level, sloping, and uneven ground. The common method of determining distance is by direct measurement with a tape. The tape is called a “chain” and is usually 100 ft in length.
What is resection method?
In surveying, free stationing (also known as resection) is a method of determining a location of one unknown point in relation to known points. There is a zero point of reference called a total station. The instrument can be freely positioned so that all survey points are at a suitable sight from the instrument.
Which is the survey tool in total station?
Which software is used in total station?
Carlson SurvPC Basic (for Total Station)
How do you measure total station accuracy?
Most total station instruments measure angles by means of electro-optical scanning of extremely precise digital bar-codes etched on rotating glass cylinders or discs within the instrument. The best quality total stations are capable of measuring angles to 0.5 arc-second.
Which direction should total station be placed?
What 3 things does a total station measure?
The total station The horizontal distance, the height difference and the coordinates are calculated automatically and all measurements and additional information can be recorded. Leica total stations are supplied with a software package that enables most survey tasks to be carried out easily, quickly and elegantly.
What is a three point resection?
The three-point resection method (also known as the “three-point problem”) is used to compute the coordinates of an unknown point by occupying the resected point and measuring angles and distance toward three known points, since the angles between three known points are determined at the unknown point (ElHassan, 1986).
What is the units of distance in total station?
Distance Measurement Electronic distance measuring (EDM) instrument is a major part of total station. Its range varies from 2.8 km to 4.2 km. The accuracy of measurement varies from 5 mm to 10 mm per km measurement. They are used with automatic target recognizer.9 Nov 2012