Latitude and Departure

     The latitude of a survey line is defined and its coordinate length measured parallel to the North-South axis (or) latitude is the projection of a survey line on the North-South line. The Departure of a survey line is define as its co-ordinate length measured perpendicular to the meridian direction. In other words departure is the projection of a survey line on the East-West line.

Advantages of Latitudes/Departures:

  1. Accuracy of linear measurements is better over long distances than angular measurements.
  2. Latitudes and Departures are easily adjustable for closure using several methods.
  3. Easily plotted on computer using Relative X/Y (@x,y)
  4. Area calculation by some methods requires coordinates or latitudes and departures.

Latitude and Departure - Video:

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