Problem 1: The accompanying sketch shows a tract of land which has been plotted from the data of a topographic survey. Plot the contour lines using 1m contour interval. The contour line with an elevation of 105m and 110 should be shown as the index contours. Determine the area of the lot using triangle Line Bearing Distance method or DMD method. Plot the directions АВ N 65°45' E 45.67m and distance, use scale of 1:500 or 1cm=5cm ВС S 44010' E 40.56m CD S 32°35' W 29.78m DE S 82°34' W 51.18m AE N 04°14' E 42.16m

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Surveys of public lands

A survey is a method used to determine the relative positions of various objects on the land by measuring the horizontal distances between them. Briefly, a survey is a process of accumulation of data of various details related to land. The main objective of surveying land is to prepare maps to a suitable scale. Various types of maps such as topographical maps, cadastral maps, engineering maps, military maps, contour maps, geological maps, archaeological maps, and so on can be prepared by surveying.