Directory structure

Generally you will set up a main directory workspace. Within that directory, set up the following sub-directories:

worldfiles

worldfiles/templates

flowtables

tecfiles

clim

defs

scripts

out

out/cal

out/cal/sims

obs

post

auxdata

When you create a mapset in GRASS, you will tell GRASS where to store it (within this same main directory workspace), and an additional sub-directory that contains the GRASS mapset will be created for you at the same level as the above.