[GRASS-user] creating contour maps from x,y.z data

[Tim Michelsen]

Hello,
I found the python matplotlib basemap toolkit as an easy and fast tool 
to plot data from a xyz data file (regular spaced) as a contour map.

For an online example see:
http://matplotlib.sourceforge.net/screenshots.html

What is the GRASS workflow to accomplish this?

I dis:

v.in.ascii my_xyz
v.surf.idw

But the result map was rather coarse with a lot of pixels and no 
definitive contours. The same data contoured with matplotlib lead to a 
nice plot.

Thanks in advance,
Timmie