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The drilling company wants us to stake a drill location
2600' west of the east section line and 2500' north
of the south section line. This is the only location
criterion given.
The project has been scouted and the SW corner, the
SE corner and the NE corner of the section have been
found, and a good place for the base receiver has been
located. Establish a base mark, setup the base receiver,
enter the antenna height and do a 5-minute single point
position which is stored as point BASE. The base receiver
is now broadcasting.
Setup the rover receiver, making sure the units are
set to feet (CONFIG key | General | Units). Next, you
will want to get into a ground coordinate system. You
will use the position of the base receiver to do this.
Perform the steps in FAQ.SR530 #8 to create a ground
scale coordinate system.
Now, start the survey and occupy the section corners
and any other features or points of interest.
To create the well location coordinates for stakeout,
we will use the COGO routines. Perform the following
steps to create the well location:
1. From the main
menu select 3 Applications.
2. Select 05 COGO.
3. The job name
will be that of the current job. If this is not the
job that contains the section corners that have been
located, select the correct job name.
4. Specify whether
or not you want a log file, and if you do, enter the
file name.
5. Set the Use
offset field to YES.
6. Set Use Brg
to YES if you want to specify directions as bearings
(0-90 east or west of north or south). If left at NO,
you will enter directions as north azimuths (0-360 clockwise).
7. Press <F1>
CONT.
8. Select 3 Intersection.
9. Select 1 Bearing-Bearing
10. For our example,
set Point Id 1 to the SE section corner.
11. With the <down-arrow>
key, move the cursor to the bearing field and press
<F2> INV.
12. Enter the SE section
corner in as Line Pt 1 and enter the NE section corner
in as Line Pt 2.
13. Press <F1>
COMP and the bearing from the SE corner to the
NE corner will be entered in.
14. Move down to the
Parall OS field and enter -2600 ft. Note: The offset
is to the left of the line so be sure to enter a negative
offset.
15. Set Point Id 2 to
the SW corner.
16. Move down to the
bearing field and press <F2> INV.
17. Enter the SW section
corner in as Line Pt 1 and enter the SE section corner
in as Line Pt 2.
18. Press <F1>
COMP and the bearing from the SW corner to the SE corner
will be entered in.
19. Move down to the
Parall OS field (this field may not be visible, but
will appear when you scroll down) and enter -2500 ft.
Note: The offset is again to the left of the line so
be sure to enter a negative offset.
20. Press <F1>
COMP.
21. The displayed coordinates
are the coordinates of the intersection, i.e., the well
location.
22. Enter in the name
for the well location point.
23. Press <F1>
STORE to store this point and stake it out later, or
Press <F5> STAKE to go immediately to the stakeout
routine.
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