Preparation; Setting The Grid Factor - Topcon ES-62 Instruction Manual

8.1 Preparation

8.1.1 Setting the GRID FACTOR

 Calculation Formula
1) Elevation Factor
Elevation Factor =
2) Scale Factor
Scale Factor : Scale Factor at the surveying station
3) Grid Factor
Grid Factor = Elevation Factor
Distance Calculation
1) Grid Distance
HDg = HD
2) Ground Distance
HDg
HD =
Grid Factor
 How to Set Grid Factor
Operating procedure
1
Press the {F3} (GRID FACTOR) key from the
Layout menu 2/2.
2
Press the {F3} (YES) key.
3
Enter Elevation. *1)
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.

*1) Refer to Section 2.4 "How to Enter Alphanumeric Characters".
Input Range: Elevation
Scale Factor : 0.990000 to 1.010000

See section 8.1.1 "Setting the GRID FACTOR" for more information.
R
R+ELEV. ELEV. : The elevation above mean sea level
×
Scale Factor
:
HDg
×
Grid Factor
:
HD Ground distance
Press the {F4} (ENT) key.
: –9,999 to 9,999 meter (–32,805 to 3,2805 ft, ft+in)
R : The average radius of the earth
Grid distance
Operation
{F3}
{F3}
Enter ELEV.
{F4}
Enter Scale
{F4}
8-3
Display
LAYOUT
F1:SELECT A FILE
F2:NEW POINT
F3:GRID FACTOR
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
8 LAYOUT
2/2
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