Backsight Summary

After you have taken your measurement you will see a summary of your shot. From this screen you can choose to accept the shot or measure again. You can also specify if you want the plate reading set to zero or a specific azimuth.

Backsight Observations and Errors

If you specified the point backsight method you will see a comparison between what you measured and the theoretical inverse. If you used the measure angle only mode, or defined a backsight direction you will not see a comparison as there isn't enough information available to compute the inverse.

Reciprocate Traverse

This option will only be available if the "Traverse Reciprocate" option in Options is turned on. By default, it is turned off.

This option can only be used if the point being occupied was previously measured and stored as a TR shot. If it was stored as a SS shot then this will be grayed out.

If this option is turned on then when you measure the backsight, FieldGenius will compute a new elevation for the point being occupied, based on:

  1. The measured elevation of the occupy point, based on its previously recorded TR traverse measurement.
  2. The computed elevation of the occupy point, based on the backsight observation and the elevation of the backsight point.

These two elevations for the occupy point are averaged together, and a new traverse observation is computed for the occupy point, which will result in the occupy point having this new averaged elevation. This computed observation is written to the raw file as a new TR record, overriding the previous TR record to the occupy point.

Plate Setting

If your instrument supports uploading of angles, the Set To Direction and Set To Zero options will be available to you. If it doesn't support this then these options will be grayed out. These functions can be used to help you set your backsight plate angles on your instrument.

Do Not Modify

With this option selected, the plate reading on the instrument will not be modified by FieldGenius. You will see the current plate reading displayed beside the pull-down list.

Set To Direction

If your instrument supports uploading of angles, the Set To Direction option will be available to you. If it doesn't support this it will be grayed out. Beside the pull-down list you will see the direction field which will contain a value based on two factors:

  1. If you specified a points for the occupy and backsight points, you will see the computed (inversed) direction.
  2. If you specified a setup point and a direction to the backsight, you will see the direction that you previously entered.

When you press the Accept button, FieldGenius will upload the angle to your instrument and set it as the current plate reading. When you accept the setup, this value will be used as the backsight plate reading in the raw file.

Set To Zero

If your instrument supports uploading of angles, the Set To Zero option will be available to you. If it doesn't support this it will be grayed out. You will see a direction value of zero displayed beside the pull-down list.

When you press the Accept button, FieldGenius will upload and set your circle plate reading to zero. When you accept the setup, this value will be used as the backsight plate reading in the raw file.

Finishing the Setup Routine
Accept

Once you've reviewed your backsight information you can complete it by pressing the Accept button. This will write a record to the raw file and exit the setup routine.

If you specified the direction backsight method you will be prompted to "Store the point observed at the backsight?" Press Yes to store a point for the backsight, or No to complete the setup without creating a new point at the backsight.

Observe Again

If you're not satisfied with the results or made a mistake you can re-shoot the backsight by using this button. Doing so will take you back to the main display where you can take another shot on the backsight.

Occupy Point Raw Records

When you accept your occupy point, points will be stored in the database for the setup and backsight if applicable. Also, the following records will be written to the raw file:

SP,PN2,N 918.0848,E 1057.3576,EL0.0000,--

--Orientation

LS,HI5.000,HR5.000

OC,OP1,N 1000.0000,E 1000.0000,EL0.0000,--

BK,OP1,BP2,BS145.00000,BC0.00000

BR,OP1,BP2,AR145.00000,ZE90.00000,SD100.00000

-- Orientation Notes (several comment lines)

If the "Reciprocate Traverse" option was used, then the following records will be written to the raw file:

TR,OP1,FP3,AR45.00000,ZE90.00000,SD100.00000,-- (Note: this is the previously measured record, not part of the occupy routine)

--Reciprocate Traverse

LS,HI5.000,HR5.000

BK,OP1,BP2,BS0.00000,BC0.00000

TR,OP1,FP3,AR45.00000,ZE90.00150,SD100.0000,--

--Orientation

LS,HI5.000,HR5.000

OC,OP3,N 1070.7107,E 1070.7107,EL99.992,--

BK,OP3,BP1,BS225.00000,BC0.00000

BR,OP3,BP1,AR0.00000,ZE89.59300,SD100.01000

-- Orientation Notes (several comment lines)