2. Given are the stations and elevations of a proposed symmetrical parabolic highway curve. POINT A B с D ELEVATION (M) 83.5 79.1 81.8 85.4 STATION 8+120 (PC) 8+230 8+260 8+360 Note: Lines AB and CD are the tangent lines of the parabolic curve. The curve will clear a boulder at Sta. 8+220. The elevation of the tip of the boulder is 80.9615m. Solve for the ff. a. length of the symmetrical curve

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Methods of Surveying

Surveying is the practice to determine the relative three-dimensional positions of various points on the earth’s surface. This is done by computing the vertical and horizontal distances, angles between the points, collecting the observations, and plotting them on a map of any appropriate scale. Accuracy can be achieved by using the latest instruments like a theodolite, tachometer, etc. Leveling is a subdivision of surveying where the objective is to locate the elevation of objects considering a datum level.