[GRASS-user] Terrain Modeling on Small Areas

[Frank Aragona]

What I'd really like to know, actually, is how to do terrain modelling 
and waterflow analysis on a small area. I have a .csv file with xyz 
coordinates.  My approach has been:

1.  Import this using v.in.ascii -z input=C:some_file.csv 
output=vector_xyz format=point fs=, skip=0 x=2 y=3 z=5 cat=1

2.  Create an interpolated raster surface with v.surf.idw from the 
imported vector map.

3.  R.contour for a contour map from the output of v.surf.idw

4.  R.flow to determine flow lines of water on the map surface

Do you all think this is a good approach?  My area is very small, about 
10 acres.  I'm not quite sure about the quality of my outputs.  If 
somebody is willing to give some tips here, would much appreciate it.

Frank Aragona