<P>Hi,</P>
<P>I want to import an ASCII x,y,value into a Grass 6.* vector map and use r.surf.idw to interpolate a surface. I can't seem to get the syntax right. </P>
<P>A line of the ASCII file:</P>
<P> </P>
<P>89.1 23.5 1202.1232</P>
<P>that represent x y value.</P>
<P>I use:</P>
<P> cat file1.tab | v.in.ascii out=map1 x=1 y=2 cat=3 fs=\ columns='x double, y double, cat double'</P>
<P>v.in.ascii reports 12838 point imported, and I can display them ok.</P>
<P>I then try:</P>
<P>v.surf.idw input=map1 output=map1r col=cat</P>
<P>v.surf.idw complains: ERROR: Cannot open old vector <A href="mailto:map1@jwortel">map1@jwortel</A> on level 2.</P>
<P>I suppose the col option should point to a field in the attribute table of map map1, but I don't see any associated mpa1.dbf file.</P>
<P> </P>
<P>any help is greatly appreciated.</P>
<P>Jeroen.</P>