Setting Of The Grid Factor - Horizon Fitness HTS-580 Series Operation Manual

11.2.3 Setting the GRID FACTOR
Calculation Formula
1）Elevation factor
Elevation factor =R/(R+ELEV)
R：the average radius of the earth
ELEV：the elevation above mean sea level
2）Scale factor
Scale factor at the surveying station
3）Grid factor
Grid factor = Elevation factor×Scale factor
Distance calculation
1）Grid distance
HDg=HD×Grid factor
HDg：Grid distance
HD：Ground distance
2）Ground distance
HD= HDg/Grid factor
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