Guide to Compass Surveying | Open and Closed Traverse

Compass Survey | Guide to Surveying and Levelling

Compass Survey is also known as Angular Surveying.

The branch of surveying in which the position of the object is located by angular measurements taken by the compass is known as “Compass Surveying”.

Purpose of Compass Surveying

When the area to be surveyed is relatively large, then the area cannot be divided into triangles.

For example:

Towns, colonies etc.

When the survey work is to be completed quickly

When the area is full of obstacles which prevent chaining.

Compass Surveying is unsuitable in areas having magnetic rock, iron core, power lines etc which attracts a magnet.

Traversing

A traverse is formed by joining the points on the ground by means of series of connected straight line.

There are two types:

  1. Open traverse
  2. Closed traverse

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Classification of Surveys and Surveying Methods in Engineering

Classification of Survey

Study of classification of surveys is a major part of the study of Surveying as a whole. The surveys are conducted using various different instruments. The use of instruments depend upon its availability and suitability to the site.

Surveys are classified as following:

  1. According to the instruments used for the survey
  2. According to the purpose of the survey
  3. According to the method employed for the survey
  4. According to the field of work

In this article, we will list out the classification in each and category and study them in detail…

According to the instruments used

Chain Survey

Chain Survey is conducted using different lengths of chains specifically made for the surveying purpose.

Compass Survey

As the name itself suggests, the compass is used for the purpose of the survey.

Plane table Survey

Plane table is used for the purpose.

Levelling

Theodolite Survey

Theodolite is an instrument that is useful for conducting accurate surveys.

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