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.
3
Enter Elevation. *1) Press the
{F4}
(ENT) key.
{F3}
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 2.4 “How to Enter Alphanumeric Characters”.
Input Range: Elevation : –9,999 to 9,999 meter (–32,805 to 3,2805 ft, ft+in)
Scale Factor : 0.990000 to 1.010000
See section 8.1.1 “Setting the GRID FACTOR” for more information.
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
