Question

Which type of survey facilitates field observations and the plotting on a sheet simultaneously?
1. Compass
2. Chain
3. Theodolite
4. Plane Table

Answer 1

Correct Answer - Option 4 : Plane Table

Concept:

Plane table surveying is the graphical method of the survey in which the field observations and plotting are done simultaneously.

Plane table surveying is based on the principle that lines were drawn during plotting always lie parallel to the corresponding lines actually present on the ground i.e the principle of plane table surveying is parallelism.

Advantages:

1. The observations and plotting are done simultaneously
2. The errors and mistakes in plotting can be checked by drawing check lines
3. Irregular objects can be plotted accurately
4. No great skills are required
5. It is less costly than a theodolite surveying
6. It is advantageous in magnetic areas

Disadvantages:

1. Not suitable for work in a wet climate and in a densely wooded country
2. Difficult to replot the map to a different scale
3. It does not give highly accurate results