Ich habe selbstverständlich nochmal nachgebohrt und dabei ist folgende Antwort per eMail bei mir eingegangen. Ich glaube mit etwas Schulenglisch dürfte jeder den Text lesen und verstehen können.
As an answer, it would be very difficult to describe how the fax format is. It could be a whole chapter in a book. And there are already books available on this subject. It's the standard Group 3 fax format. A compression method is used, although with some documents the compression isn't very good. It's good if there's a lot of white space or a lot of black, but when it's a gray scale, it doesn't compress very well.
I plan to release some programming info about the fax routines contained in geoFAX when I get some time. It will include assembly language routines for generating a fax image as well as for reading a fax image. This will help other programmers who wish to write fax software to do so. But I can't promise when I will get around to doing this.
In the meantime, if you study a book on faxes, you can figure it out. Like I said, each record is one page of the fax. I can't remember from memory right now what all is contained in record #0. I'd have
to load up the source code and study it first. But I know it contains some of the parameters that were used when the fax was created such as the resolution.
I might add that a fax document is stored in raster format. Each line of code represents the full width of the page and one pixel high. The next compressed line is the next pixel row down and so on until the bottom of the page is reached.
Also abwarten und vielleicht gibt es demnächst ein paar mehr Infos zum GeoFax-Format.
Gruss Pusti64 