Object of preparing contour map

The general map of a country includes the locations of roads, railways, rivers, villages, towns, and so on. But the nature of the ground surface cannot be realized, from such a map. However, for all engineering projects involving roads, railways, and so on, a knowledge of the nature of ground surface is required for locating suitable alignments and estimating the volume of earth work. Technical Data used in the field explained in civil surveyor course in rawalpindi. Therefore, the contour map is essential for all engineering projects. This is why contour maps are prepared.

Uses of contour map; the following are the specific uses of the contour map: The nature of the ground surface of a country can be understood by studying a contour map. Hence, the possible route of communication between different places can be demarcated. A suitable site or an economical alignment can be selected for any engineering project. The capacity of a reservoir or the area of a catchment can be approximately computed. The indivisibility or otherwise or otherwise of different points can be established. A suitable route for a given gradient can be marked on the map. Some more details of civil surveyor course in rawalpindi are as under. A section of the ground surface can be drawn in any direction from the contour map. Quantities of earth work can be approximately computed.

Characteristics of contours; The contour lines are closer near the top of a hill or high ground and wide apart near steep slope towards the peak and a flatter slope towards the foot. The contour lines are closer near the bank of a pond or depression and wide apart towards the center. This indicates a steep slope near the bank and a flatter slope at the center. Uniformly spaced, contour lines indicate a uniform slope. Counter lines always form a closed circuit. But these lines may be within or outside the limits of the map. . TSK Training for Skills and Knowledge is the best institute in Rawalpindi Islamabad for Pakistani Students who wants to join civil surveyor course in islamabad.

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