RRB JE || SSC JE || PLANE TABLE SURVEY | Most Important Previous Year Question MCQ

Описание: RRB JE || SSC JE || PLANE TABLE SURVEY | Most Important Previous Year Question MCQ #civilengineering
Plane Table Surveying
Plane table surveying is a graphical method of surveying where fieldwork and plotting are done simultaneously. It's particularly useful for small-scale surveys and topographic mapping.
Key Components:
Plane Table: A flat, level board mounted on a tripod that serves as the drawing surface.
Alidade: A sighting device with a ruler and a telescopic sight used to draw lines on the plane table in the direction of observed points.
Drawing Sheet: A sheet of paper attached to the plane table where the map is drawn.
Methods of Plane Table Surveying:
Radiation Method: The simplest method, where the plane table is set up at a station and lines are drawn to various points of interest. Distances are measured and scaled on the sheet.
Traversing Method: Used for locating plane table stations. Rays are drawn to the next station, and distances between stations are measured and scaled.
Intersection Method: Locates points by intersecting lines from two or more known stations.
Advantages of Plane Table Surveying:
Simple and Direct: Fieldwork and plotting are done together, reducing errors.
Quick and Inexpensive: Suitable for small-scale surveys and areas with limited access.
Visual Feedback: Provides immediate visual representation of the survey.
Disadvantages of Plane Table Surveying:
Less Accurate: Compared to other methods like triangulation or traversing.
Affected by Weather: Wind and rain can interfere with observations.
Limited to Small Areas: Best suited for areas with good visibility and accessible terrain.
Applications:
Topographic Mapping: Creating detailed maps of terrain features.
Preliminary Surveys: For feasibility studies and route planning.
Cadastral Surveys: Mapping land boundaries and property lines.
Archaeological Surveys: Recording and mapping archaeological sites.
In Summary:
Plane table surveying is a valuable tool for certain types of surveys, especially when speed and simplicity are prioritized over extreme accuracy. It's a hands-on method that provides a direct connection between field observations and the final map.

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