- When the multiset routine is run in FieldGenius, the user can observe the backsight and foresight as many times as required.
- FieldGenius can tell if the measurement is face right or face left by checking the vertical angle (0 to 180 = right, 180 to 360 = left)
- The user is presented with a dialog summarizing all observations
- The user can reject some observations if required
- The results are stored in the raw file as a TR or SS record
- A short summary of how FieldGenius computes the traverse once "Store Point" is picked from the multiset routine:
- Backsight observations are averaged and stored as a "BC" record
- Foresight observations are averaged
- A TR or SS record is written which records the averaged foresight plate reading is stored as an "AR" record
- The computed direction to the foresight point is based on the angle between the averaged backsights and the averaged foresights.
Let's look at an Example:
OC,OP1,N 100.0000,E 100.0000,EL100.0000,--
BK,OP1,BP2,BS356.25515,BC45.00300
BR,OP1,BP2,AR45.00300,ZE90.00000,SD117.6302
RB,OP1,BP2,AR45.00000,ZE90.00000,SD117.6304,HR0.000,--
RB,OP1,BP2,AR225.01000,ZE270.00000,SD117.6300,HR0.000,--
RF,OP1,FP3,AR135.00000,ZE90.00000,SD100.0000,HR0.000,--
RF,OP1,FP3,AR315.01000,ZE270.00000,SD100.0000,HR0.000,--
SS,OP1,FP3,AR135.00300,ZE90.00000,SD100.0000,--
Transit @ 1, Backsighting 2, Foresighting 3
THE BACKSIGHT:
OC,OP1,N 100.0000,E 100.0000,EL100.0000,--
BK,OP1,BP2,BS356.25515,BC45.00300
--Averaged BS plate reading (Face Right)(computed from RB lines below) : 45-00-30.0
BR,OP1,BP2,AR45.00300,ZE90.00000,SD117.6302
--BR record just provides additional info
RB,OP1,BP2,AR45.00000,ZE90.00000,SD117.6304,HR0.000,--
RB,OP1,BP2,AR225.01000,ZE270.00000,SD117.6300,HR0.000,--
THE FORESIGHT:
RF,OP1,FP3,AR135.00000,ZE90.00000,SD100.0000,HR0.000,--
RF,OP1,FP3,AR315.01000,ZE270.00000,SD100.0000,HR0.000,--
SS,OP1,FP3,AR135.00300,ZE90.00000,SD100.0000,--
--Averaged FS Plate reading (Face right) 135-00-30.0
Now we compute the angle to 3:
Average foresight plate reading: 135-00-30.0
- Average Backsight plate reading: 45-00-30.0
= 90-00-00 ...the final angle
The final angle will be applied to the computed direction to the backsight to compute the final direction to the foresight.
