Question
Download Solution PDF_________ is the essential method of orienting a table.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation :
Methods of Plane Table Surveying:
Generally, there are four methods are available to perform plane table surveying. They are
- Radiation
- Intersection
- Traversing
- Resection
Resection:
- It is a method of orientation employed when the table occupies a position not yet located on the drawing sheet.
- It is defined as the process of locating the instrument station occupied by the plane table by drawing rays from the stations whose positions have already been plotted on the drawing sheet.
Important Points Operation in Setting up a Plane Table:
At each station, the plane table is required to get set up before carrying out any plotting work. It basically consists of three operations: fixing, leveling and centering.
(a) Fixing:
- The top of the tripod stand is fixed in level by eye estimation at a convenient height with its legs uniformly spread and shoes fixed firmly into the ground.
(b) Levelling:
- The top of the table is leveled by moving the legs of the tripod.
(c) Centering:
- There are two types of operations involved in the centering of the plane table.
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