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MAGM 230 Field Surveying

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MAGM 230 Field Surveying

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    2. Types of Land Measurement Estimating Pacing Measuring Wheel Stadia Taping Electronic Odometer

    3. Choosing the Proper Technique Accuracy vs. Cost vs. Time Canyon rim – Stadia Property line – Tape City Survey – Measuring wheel Buried treasure - Pacing

    4. Pacing Generally used for small distances 25’ – 100’ Valuable practical knowledge Requires no equipment Reasonably accurate Easy / little math Anyone can do it Uses Rough check other work or estimation Detect large errors in taping or stadia Fence estimation Flagging Seed calibration

    5. Pacing Types Military – 30” step (2.5’) Natural – 2.5’ – 3.0’ Standardized – 3.0’ Stride = two paces (forestry pace)

    6. Pacing Sources of Error Miss counting Tripping or stumbling Not walking in a straight line Terrain – open & level

    7. Individual differences in pace length Shoe size Individual – height, weight, muscle mass Rate of speed Terrain – Pace shortens going uphill Age – coordination, concentration

    8. How to Pace Carry pace to nearest 0.5’ accuracy. Use natural pace Use average gate Determine the average number of paces in 100’ for each individual. Measure out 100 feet Determine how many feet for each pace Pace course 12 times Throw out high and low Average remainder Example 30.5, 30, 31, 30, 29, 30, 30, 30.5, 30, 31, 32, 30 = 303 total paces 303 total paces ÷ 10 attempts = 30.3 paces to travel 100 feet Write out the above (paces and math) and the answer on rear (non-lined) of card

    9. Pacing Lab Equipment Group Tape, surveyors pins Individuals Pencil, note paper, 3x5 card Procedure Mark a starting point of your toe with a pin Pace out 10 paces Mark last pace with a pin at the toe. Record how many feet each 10 paces are Throw out high and low Average remaining 10 paces by adding them all together and dividing by 10 (the amount of times paced). Distance ÷ paces = Feet per pace ie: 25.4 feet ÷ 10 paces = 2.5 feet / pace Conclusion Turn in 3x5 card as shown on the front (lined)

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