1 56.3331239 41.3052903
2 56.333281 41.3052708
Looking at this data, I have a couple of questions.
Are the line numbers (1 and 2) part of the data?
What characters come between each line? Perhaps Cr (13) and/or Lf (10)?
If you want to find a particular record what criterion do you want to use - for example do you want to find the next line or do you want to find the line with Line Number 23 or what?
Is there a guaranteed minimum line length?
If you don't have fixed length records the only way to find a position in the file is to go through the file byte by byte until you find what you want.
You still haven't told us what software is creating the file? Is it a secret? (I'd tell you but then I'd have to shoot myself? 
)
...R