![]() There are three ways of the Indirect methodĪlso Read: What Is the Well Point System? | Types of Well Point System | Advantages & Disadvantages of Well Point System In this way, relative heights are determined by level machine keeping staff at different points. With less effort from an INDIRECT METHOD,Ĭontour lines can be drawn on the map. ![]() This method is faster and cheaper than the direct method. Thus marking the different points with a 1.40 mt reader on the ground and connecting them becomes a contour line with 100 mt R.L.Īlso Read: What is Tributary Area? | Tributary Area in Column | How to Calculate Tributary Areas 2. So that the staff reading of each point on the 100 mt contour line is 1.4 mt. We now have to draw a ground contour line of 100 mt. Suppose the benchmark is R.L 100 mt, and It comes with a reading of 1.40 mt. In this method, the level machine is fixed in the center, then the machine’s leveling is done than reading is done on the benchmark first. In this method, the points connecting the points of equal height are drawn using a dumpy level machine. To determine the alignment of water lines and sewer lines.To determine the alignment of city roads.To determine the boundary of state and municipality.Topographical Survey: Determining natural features rivers, lakes, forests, etc., and artificial features road, railway, cities, villages, etc. ![]() The larger the scale of the map, the smaller the contour spacing. The smaller the scale of the map, the higher the contour spacing. The contour lines of a plain are straight and parallel to each other. Nature of Ground:īut if the sloping of the ground is high, then the contour lines are far apart from each other.Īnd if the slope of the ground is low, then the contour lines are very close to each other. The contour line on the map ends at the point where it started.Īlso Read: What Is a Dead Load? | What Is Live Load? | Difference Between Dead Load Vs Live Load Contour Interval Depends on the Following Factors.Contour lines of similar height do not intersect.Four pairs of contour lines represent it. ![]()
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