A friend of mine gave me the following url:
http://lazarus.elte.hu/hun/digkonyv/topo/3felmeres.htm
It's an index for a big collection of old east-european maps (200k).
(3rd Military Mapping Survey of Austria-Hungary)
These maps can be a great source for finding offroad/hiking tracks because it turns out they contain still existing tracks that are often deprecated on more recent maps...
Would it be possible to calibrate those in ttqv?
If so, what would be a good approach?
Take for example:
http://lazarus.elte.hu/hun/digkonyv/topo/200e/39-46.jpg
In the upperleft corner: 38'30 Ostlich v. Ferro
The index also states that "Longitude is counted from Ferro".
What does that mean?
Thanks in advance for any help or information...