Important points selected at the ends of the chain line to command the boundaries of the survey are called
- AMain stationsCorrect
- BSubsidiary stations
- CTie stations
- DNone of the above
Solution
Concept
Types of survey stations
Step-by-step solution
1. Main stations are the ends of the main survey lines that command the boundary of the survey. 2. Subsidiary stations are on the main survey lines and are used for check lines or detail. 3. Tie stations are on the main lines for fixing tie lines.
Explanation
Main stations are the important points at the ends of the chain lines that control the boundary of the area to be surveyed. Lines joining them are the main survey lines.
Shortcut
Main stations → boundary; subsidiary/tie stations → on the main lines.
Common mistake
Choosing subsidiary stations.
Correct answer: A) Main stations