#blub civil
Contouring - Surveying...for civil Engineering and Architecture..
1. CHAPTER 7 Er. Pramesh Hada, Assistant Professor, nec Er. Pramesh Hada •BE Civil Engineering (2002-2006) •MSC Urban planning (2009-2011) •Assistant Professor Nepal Engineering College, Changunarayan,Bhaktapur By:- CHAPTER 7 1
2. CHAPTER 7. CONTOURING (4 HOUR) 7.1 Basic Definitions in Contouring –pu 2010 7.2 Contour Interval (pu 09,10,14, 15), Horizontal Equivalent . 7.3 Characteristics of Contours – pu 08,09,10,11,13,14) 7.4 Methods of Contouring – pu 09,10,11,13,14 Er. Pramesh Hada, Assistant Professor, nec 7.4 Methods of Contouring – pu 09,10,11,13,14 7.5 Interpolation of Contours (PU 2015) 7.6 Uses of Contour Maps – pu 09,11,13 2
3. Er. Pramesh Hada, Assistant Professor, nec 3
4. •Contour An imaginary line on the ground surface joining the points of equal elevation is known as contour. •It facilitates depiction of the relief of terrain in a two dimensional plan or map. •In other words, contour is a line in which the ground 7.1 Basic Definitions in Contouring –pu 2010 Er. Pramesh Hada, Assistant Professor, nec •In other words, contour is a line in which the ground surface is intersected by a level surface obtained by joining points of equal elevation. This line on the map represents a contour and is called contour line. •Contouring is the science of representing the vertical dimension of the terrain on a two dimensional map. 2CONTOURINGCONTOURING 24
5. Contours Er. Pramesh Hada, Assistant Professor, nec Contour interval = 30 m 5
6. Er. Pramesh Hada, Assistant Professor, nec Different contour mapsDifferent contour maps 6
7. Er. Pramesh Hada, Assistant Professor, nec 7
8. RELIEF OR SHAPE OF THE LAND IS SHOWN BY CONTOURS Contours are those light brown or orange lines that can see on maps. A contour line is an imaginary line that joins points of equal height above sea level. The lines are numberedThe lines are numbered giving the height above sea level in metres. On 1:50000 map the contours will be drawn for every 10 metre rise. Although on this map they are every 3m so always remember to check. Er. Pramesh Hada, Assistant Professor, nec 8
9. It is important to remember that the closer together the contour lines the steeper the slope. Steep slopes Er. Pramesh Hada, Assistant Professor, nec Area that is flatter with only a gentle slope XXXX 9
10. Er. Pramesh Hada, Assistant Professor, nec Contour Map : A map showing contour lines is known as Contour map. A contour mapidea of the altitudes of the surface features as well as their relative positions in plan serves the purpose of both, a plan and a section.and a section. Contouring : The process of tracing contour lines on the surface of the earth is called Contouring.
