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These days I am using Top-con Total Station. That top-con software has some thing called " Grid Factor".
I am using SLD 99 Sri Lanka coordinate system and used GPS to establish few control points at site.
My problems are
I found this information from top-con manual.
1) Elevation Factor
Elevation Factor = R R : The average radius of the earth
R+ELEV. ELEV. : The elevation above mean sea level
2) Scale Factor
Scale Factor : Scale Factor at the surveying station
3) Grid Factor
Grid Factor = Elevation Factor × Scale Factor
1) Grid Distance
HDg = HD × Grid Factor HDg : Grid distance HD : Ground distance
2) Ground Distance
HD = HDg
Welcome any idea and Thanks for helping
This Content Originally Published by a land surveyor to Land Surveyors United Network
Please let me know how could I know the scale factor of surveying station