[MITgcm-support] bathymetry file in a .bin format

[smaeilpour]

Hi MITgcm experts and dear all,
i created a file (in .asc format) by GEBCO Grid Demonstrator Software, so i converted it to a TXT format, now for creating a bathymetry file for MITgcm Model, should values be positive (+) or negative (-) in water? as regards, the ocean surface is at z=0, and land values should be zero (0).
could you please write me the commands in MATLAB that i can create a bathymetry file in a binary format (e.g. .bin)? or what way is easy for making it?
thank you in advance.

Best,
saeid