8-3
8 LAYOUT
8.1 Preparation
8.1.1 Setting the GRID FACTOR
Calculation Formula
1) Elevation Factor
2) Scale Factor
Scale Factor: Scale Factor at the surveying station
3) Grid Factor
Grid Factor = Elevation Factor
×
Scale Factor
Distance Calculation
1) Grid Distance
2) Ground Distance
How to Set Grid Factor
Operating procedure
Operation
Display
1
Press the [F3](GRID FACTOR) key from the
Layout menu 2/2.
[F3]
2
Press the [F3](YES) key.
[F3]
3
Enter Elevation. *1)
Press the [F4](ENT) key.
Enter ELEV.
[F4]
4
Enter Scale Factor in the same way.
Grid Factor is displayed for 1 to 2 second and
display returns to Layout menu 2/2.
Enter Scale
[F4]
*1) Refer to Section 2.5 “How to Enter Alphanumeric
Input Range: Elevation : –9,999 to +9,999
meter (–32,805 to +3,2805 ft, ft+in)
Scale Factor: 0.990000 to 1.010000
R R
: The average radius of the earth
R+ELEV. ELEV.
: The elevation above mean sea level
Elevation Factor =
HDg = HD
HDg
: Grid distance
HD
: Ground distance
×
Grid Factor
HDg
Grid Factor
HD =
LAYOUT 2/2
F1:SELECT A FILE
F2:NEW POINT
F3:GRID FACTOR P
↓
GRID FACTOR
=0.998843
>MODIFY? [YES][NO]
GRID FACTOR
ELEV.=1000 m
SCALE:0.999000
--- --- [CLR][ENT]
GRID FACTOR
ELEV.:2000 m
SCALE
=
1.001000
--- --- [CLR][ENT]
GRID FACTOR
=1.000686
