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9) Measurement of horizontal angles theodolite by method of repetition. 10) Measurement of vertical angles with theodolite. ( One full size drawing sheet). To measure horizontal angle between two objects by repetition method with To measure vertical angle of given points by Electronic theodolite. 8. To set out a Choose a point situated well above the ground and with the transit or with the theodolite measure the vertical angle between the horizontal plane and the top of the confederation building. Note: Make it sure the instrument is leveled properly before measurements. Orient the graphometer with its 0° to 180° sighting line on the left side AB of the angle you need to measure . Position the graphometer so that its centre , the bolt, is exactly above point A on the ground, the station , from which you will measure horizontal angle BAC. LAB # 12: STUDY OF THEODOLITE. 32. LAB # 13: HORIZONTAL ANGLE MEASUREMENT. “CLOSING THE HORIZON”. 37. LAB #14: MEASUREMENT OF THE THEODOLITE operational manual carefully before usage of the instrument. angle percentage. Measure slope /horizontal/vertical distance. POWER. Measuring horizontal angle. When theodolite is setup, point to backsight (BS). Zero the instrument. Write actual zero into field book (might be not exact zero). Free the motion and point to foresight (FS). Tighten the motion and use screw for fine adjustment. Read the angle, write into field book. 1. Study of theodolite in detail - practice for measurement of horizontal and vertical angles. 2. Measurement of horizontal angles by method of repetition and.4.6.1 Horizontal angle measurement. 4.6.1.1 The purpose of these instructions is to assist the Theodolite tribrach (with circular level and optical plummet).