I'm following the JHS Formula for Transverse Mercator mentioned in page 52 and the examples after it. It seams easy to just calculate the constants for my area and put them in the formula.
The info I have now is: (reference )
Latitude of Origin (Lat0) = 0 Longitude of Origin (Lng0) = 57 Scale of factor = 0.9996 False Easting= 500,000 False Northing= 0
To calculate the first constant I have the formula
QO = asinh(tan(LatO)) – [e atanh(e sin(LatO))]
And the later constants can be calculated from it, But to calculate Q0, I don't know the values 'a' and 'e'.
In the example 'a' and 'e' are calculated as a parameter of the ellipsoid used for Projected Coordinate Reference System OSGB 1936. I'm assuming the values will be different for my projection system.
Please help me from where can I get these values.
Also let me know if I'm moving in the right direction or not, or if there's another way for achieving my goal. God bless the libraries like ArcPy and GDAL for saving me from calculations like these for so long.