Lab Theodolite Random Errors Choose an electronic theodolite, total station OK. 1. Determine the precision of the reading mechanism, Er (error in reading) a. Sight a point target (speck on wall, etc) b.Take a reading with the theodolite 20 times in succession. Record all readings. c. Calculate the standard deviation of the readings. This is Er 2. Determine the precision of the combined operation of pointing and reading, Erp (error of pointing and reading) a. Sight a point target, center cross hair on target. b. Repeat sighting with upper motion and reading for a total of 20 readings. c. Calculate the sample's standard deviation. This is combined effect of pointing and reading, Epr. 3. Determine the precision of the combined effect of "centering" the theodolite, pointing, and reading the instrument, Erpc. a Read the horizontal angle on a tribrach-mounted target centered over a ground point at a sight distance of Dist = about 100 ft. Record Dist. b. Rotate the tribrach 90 degrees clockwise on the
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This note was uploaded on 05/19/2011 for the course GEM 3330 taught by Professor Gibson during the Spring '11 term at University of Florida.