Civil Engg, Building, Road, Construction Ideas & Guides
Category: Survey Engineering
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 … Continue reading How To Calculate True Bearing From Magnetic Bearing – || Rules and Example||
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 that are used for civil engineering surveying and levelling. And, what colour is used for different objects such as river, railway, road bridge, culvert, tube well, open … Continue reading 42 Types of Map Symbols – With Their Sketch Drawing and Colour ||Civil Engineering Surveying Symbols||
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 … Continue reading Convert Quadrantal Bearings to Whole Circle Bearing -Example
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 … Continue reading Convert The Whole Circle Bearing to Reduced Bearing – || Rules and Example ||
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) … Continue reading Numerical Example For Error Due To Wrong Measuring Scale – Survey Engineering
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. … Continue reading 7 Uses Of Surveying