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surverying lab

by: Nathaniel Notetaker

surverying lab

Nathaniel Notetaker

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Class Notes
surveying lab
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This 10 page Class Notes was uploaded by Nathaniel Notetaker on Friday April 8, 2016. The Class Notes belongs to at Mississippi State University taught by in Summer 2015. Since its upload, it has received 8 views.


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Date Created: 04/08/16
Mississippi State University Department of Civil Engineering Total Station Check and Stake Out of Straight Line CE 2213: Surveying Laboratory Session: Thursday Nathan Walker Plot 6 Date of Survey: 10/8,15/2015 Date of Submittal: 10/22/2015 Table of Contents 2 Section Page Table of Contents 2 Objective 3 Apparatus 3 Procedure 4 Results 5 Figure 1. Straight Line Elevations and Distances 5 Discussion 6 Conclusion 6 Field Notes 7 Sample Calculations 8 Figure 2. Angle of ABC 8 Grade Breakdown 10 Objective 3 The objective of this total station lab was to obtain the elevations of points A and C by shooting both the horizontal and vertical angles of each point. A total station and a prism pole were used to gather this information. Both a direct and an inverted reading were shot for vertical and horizontal. The instrument was set up on all three points and the information was recorded so that it could be compared. The angles can be computed to determine the elevations of the unknown points. Apparatus  Total Station – a combination of an Electromagnetic Distance Measuring Instrument and an electronic theodolite that can be used to measure horizontal and vertical angles as well as sloping distance of an object to the instrument.  Prism Pole – A transparent body of this form, often of glass and usually with triangular ends, used for separating white light passed through it into a spectrum or for reflecting beams of light.  Stakes- a wedge cut out of wood that is used to mark a location on the surface of the earth, and it can be used as a semi-level stand for a piece of equipment.  Hammer- A device with a heavy head made of hard metal with a handle. It is commonly used on construction sites to drive nails into boards and/or drive stakes and posts into the ground. In some instances, the hammer is used as a demolition tool.  Tripod– A tripod is a portable three-legged frame, used as a platform for supporting the weight and maintaining the stability of some other object which provides stability against downward forces and horizontal forces and movements about horizontal axes. 4 Procedure Total Station Check and Stake Out of Straight Line 1. The total station was unpackaged from the box and a battery was inserted into it. 2. The tripod was then setup on point B, and the total station was attached to the tripod. 3. A temperature reading and an adjusted barometric pressure were keyed into the total station after the leveling process was completed. 4. The prism pole was positioned 200 feet away and a stake was drove to mark point A. 5. Both the direct and the inverted readings of the horizontal and vertical angles were shot and recorded. 6. The prism pole was then moved 200 feet on the other side of the total station and in line with the other two points. A stake was drove here to indicate point C. 7. The same reading were performed as indicated in step 5. 8. The total station was then repositioned to point A and was releveled. 9. The same sequence of shots as recorded in step 5 were then completed for both point B and point C. 10. The total station was then moved to point C where it was releveled for a final time. 11. Once again, the same shots as before were shot on points B and A and the measurements were recorded. 12. Due to unforeseen weather conditions, the final two setups on points A and C were delayed for a period of one week. 13. The recorded data was then able to be used in the office to compute the elevations of the points. 5 Results (Results obtained for the experiment - include lab summary sheets and sketch of plot, do not include calculations or raw field notes in this section) 6 Discussion The results of this experiment gave the distance, angle, and elevation of each point in the straight line plot. The accuracy is within a few seconds or a few tenths of a foot on each measurement. The internal constant of the EDM was checked by finding K and it showed to have 0.00 ft of error meaning that any mistakes made were not likely to be instrumental. The mistakes made were due to natural errors such as temperature, microclimate, and refraction. There is also a good chance that some personal errors made in the setup of the prism pole contributed to the variations of distance and angles. Overall, the accuracy was within a reasonable range. Conclusion By conducting this experiment, a knowledge of how to setup and read an EDM was obtained. The skillset of being able to read distances, as well as angles, in an accurate manner was also achieved. By learning these procedures, a surveyor can use a very modern piece of equipment to provide precise distances and elevations on a plot of land. 7 Field Notes (This is where your raw field notes taken in lab go, do not rewrite them here just attach whatever piece of piece of paper you took field notes on) 8 Sample Calculations (This is were all your calculations go, you can type them or write them neatly on engineering paper) 9 Lab Report Grade Breakdown 10 Score Title Page ___/5 Table of Contents ___/5 Objective ___/5 Apparatus ___/5 Procedure ___/10 Results ___/25 Discussion ___/5 Conclusion ___/5 Field Notes ___/20 Sample Calculations ___/15 Late: _____ Total: ______/100


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