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Find 7 Parameters and transform a drawing

PostPosted: Fri Sep 18, 2015 2:45 pm
by bingeomap
I am new in Carlson Survey. Therefore I can't resolve my task.

There are 64 geodetic control points (benchmarks).
And I have got their coordinates in two systems: 1) in SK-42 (it is Pulkovo-42 \ Gauss-Kryuger Zone-9) and 2) in UTM-39 \ WGS-84.

My questions:
1) How can I find the 7 Helmert transformation parameters from first to second system?
2) After it, how can I transform (appling the parameters) my maps (drawings) from first system to second?

Thank you!