Question

In an area to be surveyed the line which covers entire area to be surveyed and has to be measured very accurately is

• A. Base line
• B. Off sets
• C. Check lines
• D. Tie lines

Hint:

The name says it all: the base line is the "base" or "foundation" of the entire survey.
Just like the foundation of a building, it must be established with the greatest care and accuracy.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
We need to identify the name of the most important and accurately measured line in a chain or traverse survey.

Step 2: Detailed Explanation:
In chain surveying, a framework of triangles is used to map an area.
The accuracy of the entire survey depends on the accuracy of this framework.
-

Base line: This is the first and longest line of the main survey framework.
It is typically run through the middle of the survey area and serves as the foundation upon which all other measurements are built.
Because its accuracy directly affects the entire survey, it is measured with the highest possible precision.
-

Off sets: These are short, secondary measurements taken from the main chain lines to locate details.
They are not part of the main framework.
-

Check lines and

Tie lines: These are additional lines measured within the framework to verify the accuracy of the work and to locate additional details, but they are subsidiary to the base line.

Step 3: Final Answer:
The line that covers the entire area and must be measured very accurately is the base line.
This corresponds to option (A).