Here is a description of the file Format.
http://www.ngdc.noaa.gov/seg/freeform/ffnd.html
Getting custom data, in my case The Netherlands:
http://apex.ngdc.noaa.gov/cgi-bin/se...o/customdatacd
I tried an ASCII file to look at the data. You can see it for yourself in one file by choosing the Transfer Option: Screen.
When you choose the transfer by FTP you get 3 files. In the data file there are rows and colums of data. In the header files there are descriptions of the number of rows and colums and the offset point.
Where do I get the pf-files? Can I change the Globe ASCII-files to pf-files by hand