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GPS Surveying

GPS Surveying. GPS -- how it works GPS -- Garmin 12. Change windows. Use to scroll and for keying. Confirm. TURN ON. Get back to a point. The Garmin 12 GPS. Trilateration and a 4 th for timing. The satillite. It ’ s signal. Nav. Error. First page up…. 4 important pieces of data.

roanna-graham
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GPS Surveying

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  1. GPS Surveying • GPS -- how it works • GPS -- Garmin 12

  2. Change windows Use to scroll and for keying Confirm TURN ON Get back to a point The Garmin 12 GPS

  3. Trilateration and a 4th for timing

  4. The satillite It’s signal Nav Error First page up…. 4 important pieces of data

  5. Where you are Your elevation (flaky) Are you moving? Are you late? Once you have a fix

  6. Hit GOTO Pick a Waypoint Follow the arrow Monitor Speed Check Distance Getting back to where you started

  7. GPS Accuracy Non-corrected 5-30 m Beacon-corrected 1 m Radio-corrected cms Post-processed dm to m

  8. Differential GPS for precision surveying of river terraces and alluvial fans

  9. Crash Course in Surveying With an Auto Level:

  10. 1 First thing first: Gotta level the it :( (:

  11. 1 TOP = DISTANCE BOTTOM = DISTANCE CENTER LINE - ELEVATION D

  12. 1 The Auto Level: The Stadia Rod Or Surveyor’s Staff The Instrument And Tripod = l (m) * 100 (m)

  13. So what’s this height? How to read the Stadia Rod: 11 meters on the dot Each Black Rectangle = 1 cm 10.8 meters on the dot Same for Each white one 10.66 meters

  14. Top Stadia = 10.91 m Height = 10.85 m Bottom Stadia = 10.79 m To Get Distance Away: (Top - Bottom Stadia) = 0.12 m 2) Multiply difference by 100: Distance = 12 meters What you’ll see through the eyepiece: Stadia Lines

  15. 1 Distance Height (X, Y) For your X-section, be sure to get any Major changes in slope

  16. How to collect the data: NOTE: When shooting features off your line, you will also need a bearing

  17. ?

  18. Side-Scan LiDAR: GeoArcheology

  19. “Project North” is at the white house, And that is BM1 BM 4 PN BM 3 Same scale as x-axis BM 2 BM 1 Figure out appropriate scale for x: 1 box = 1 meter? 10 meters? You want your entire survey to fit!

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