The data is from Garden Ridge (Mt Victoria).
The data file is called GRIDGE.MAG. Also there are two files MAGXYZ.EXE and MAGXYZ.SCN Create a directory with all three files. Program MAGXYZ will read the .MAG file and rewrite it in XYZ (.XYZ) format.

The grid extents are 0,2000,0,2000
Type Contorl-F to run after defining files.
Inout is GRIDGE
Output is OUT