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Following are not types of total station
Manual total station
Semi-Automatic total station
Mechanical total station
Automatic total station
Mechanical total station
Total Stations are broadly categorized based on their degree of automation into Manual Total Stations, Semi-Automatic Total Stations, and Automatic (or Robotic) Total Stations. Mechanical Total Station is not a recognized classification or standard term used for Total Stations, as all Total Stations inherently integrate electronic distance measurement (EDM) and electronic digital theodolites.
Total Stations are broadly categorized based on their degree of automation into Manual Total Stations, Semi-Automatic Total Stations, and Automatic (or Robotic) Total Stations. Mechanical Total Station is not a recognized classification or standard term used for Total Stations, as all Total Stations inherently integrate electronic distance measurement (EDM) and electronic digital theodolites.
D=21тАЛcтЛЕt тАФ EDM distance measurement using time-of-flight of electromagnetic wave
H=DтЛЕcos(╬╕) тАФ Horizontal distance calculation from slope distance D and zenith angle ╬╕
A Total Station operates by integrating an Electronic Distance Meter (EDM) with an electronic digital theodolite, using a microprocessor to process distance and angular measurements simultaneously. Manual types require manual sighting and reading triggers, semi-automatic types automate angle/distance calculations, while robotic/automatic total stations utilize motorization and target tracking to operate remotely.
Manual Total Station requires the operator to manually point the telescope and read/store values.
Semi-Automatic Total Station automatically reads and processes horizontal/vertical angles and EDM distance.
Automatic (Robotic) Total Station can automatically track the target reflector prism and be controlled remotely by a single operator.
The term 'Mechanical' refers to conventional optical theodolites or transit instruments, not modern Total Stations.
Provides high accuracy for both horizontal/vertical angles and spatial distances.
Reduces manual calculation errors with internal microprocessors.
High initial cost compared to conventional optical surveying instruments.
Requires battery power and electronic maintenance.
Topographical land surveys and boundary mapping.
Cadastral surveying and infrastructure layout staking.
Option A (Manual total station): User manually enters values or manually aligns crosshairs, but EDM measures electronically.
Option B (Semi-Automatic total station): Coordinates and distances are computed automatically once target is aligned.
Option C (Mechanical total station): Incorrect terminology; a total station is fundamentally an optoelectronic device, not a purely mechanical instrument.
Option D (Automatic total station): Uses motorization and ATR (Automatic Target Recognition) to track prisms automatically.
C is correct тАФ Mechanical total station is not a standard type or valid classification of Total Station instruments.
For competitive exams, remember that Total Stations are always electronic/optical integrations; terms implying pure 'mechanical' operation are incorrect classifications.