Survey Engineering – Civil Engineering

How To Calculate True Bearing From Magnetic Bearing – || Rules and Example||

4th June 201922nd March 2020 Malay Sautya No Comments

Calculate True Bearing From Magnetic Bearing If the magnetic declination at a place at the time of observation is known, the true bearing of a line can be calculated from its magnetic bearing and vice-versa. Determination of True Bearing From Magnetic Bearing Rules The following rules are applied to determine the true bearing if the…

Mathematical Example, Survey Engineering

42 Types of Map Symbols – With Their Sketch Drawing and Colour ||Civil Engineering Surveying Symbols||

7th May 201916th March 2020 Malay Sautya No Comments

42 Types of Map Symbols In a map, the objects are shown by symbols or signs, not by names. Following are the 42 types of map symbols which are used for civil engineering surveying and levelling. And what colour is used for different objects( like the river, railway, road bridge, culvert, tube well, open…

Survey Engineering

Convert Quadrantal Bearings to Whole Circle Bearing -Example

30th April 20194th January 2021 Malay Sautya No Comments

Convert Quadrantal Bearings to Whole Circle Bearing Convert the following quadrantal bearing into whole circle bearing: 1. N 30°30՛ E 2. S 50° E 3. S 20°45՛ W 4. N 25° W Solution: How to draw the line for a Q.B ?? For Example: N 30°30՛ E, S 20°45՛ W & for N 25° W. In case of N 30°30՛ E, the…

Survey Engineering

Convert The Whole Circle Bearing to Reduced Bearing – || Rules and Example ||

29th April 201916th March 2020 Malay Sautya No Comments

Convert Whole Circle Bearing to Reduced Bearing Rules 1. When Whole Circle Bearing(W.C.B) lies between 0° to 90°. Reduced Bearing(R.B) = W.C.B 2. When W.C.B lies between 90° to 180°. R.B = (180° – W.C.B) 3. When W.C.B lies between 180° to 270°. R.B = (W.C.B – 180°) 4. When Whole Circle Bearing(W.C.B) lies between 270° to 360°. Reduced Bearing(R.B) = (360° – W.C.B) Example…

Survey Engineering

Numerical Example For Error Due To Wrong Measuring Scale – Survey Engineering

29th April 201916th March 2020 Malay Sautya No Comments

Numerical Example For Error Due To Wrong Measuring Scale Following numerical example shows that how to calculate correct length and area, if errors occur due to wrong measuring scale: Numerical Example A surveyor measured the distance between two points marked on the plan drawn to a scale of 1cm = lm (R.F. = 1: 100)…

Mathematical Example, Survey Engineering

7 Uses Of Surveying

28th April 201916th March 2020 Malay Sautya No Comments

7 Uses Of Surveying Surveying may be used for the following various purpose: 1. Engineering Surveying Engineering surveying is used for the design and construction of a new project such as road, railway, building, city, towns etc. 2. Topographical Surveying To prepare a topographical map, which shows the hills, rivers, valleys, forest, village, towns, etc….