Spectra Precision Survey Pro v4.5 Ranger User Manual - Manual (Page 302)

User’s Manual – GPS Mode
292
• Tap Side Shot to point 100, enter AR = 90-00-00 ZE = 90-00-
00 and SD = 1000 ft.
• Tap Side Shot to point 101, enter AR = 135-00-00 ZE = 90-00-
00 and SD = 1000 ft.
• Review the Results tab and notice the horizontal distance is
exactly what you entered
14. Do some COGO in the Ground Coordinates system.
• Go to COGO > Point in Direction
• Select your occupy point as the From Point.
• Set the backsight azimuth as the azimuth. You can enter b54
– bchap.
• Set the +- angle the same as the previous shot. You can enter
135 here, or use the power button to choose Past Results, and
pick your last horizontal angle.
• Set the horizontal distance to 1000.
• Choose to Store Point at PiD101.
• Examine the inverse between PiD101 and 101, they should
be at the same location.
If you wish to complete all of your total station survey using Ground
Coordinates, you will not have to worry about using the survey scale
factor on your distances. However, if you need to switch back to grid
coordinates, you do need to use a scale factor with your total station
measurements and when using the COGO calculations. The next part
of the tutorial explains use of scale factors when in Mapping Plane
mode.
15. Switch back to the mapping plane coordinate system
• Switch back to GPS mode. Go to Survey > Projection, and tap
Setup Ground Coordinates. Choose to Use Grid Coordinates to
switch back to the mapping plane coordinate system.
• The Adjust with Projection wizard opens and converts all of
your job file points to the ground coordinate system. Tap
Apply to update the coordinate system and the job file points.