[GRASS-user] v.patch: Correct Syntax?

[Hamish]

> > you want v.overlay or v.select, not v.patch.

Rich wrote:
>   Simple tool, but I somehow messed it up. I get
> either the bmap or a blank display monitor.
...
>   I created the map using g.region for the area of
> interest, and named that region 'abernethy'.

ie g.region + v.in.region?


> Yet running v.overlay like this:
> 
> GRASS 6.5.svn (Oregon):/usr4/grassbase > v.overlay
> ainput=clack_soilmapunits
> atype=area binput=abernethy btype=area
> output=bl_soilmapunits
> 
> produces a solid rectangle for the output.

the default for operator= is "or". I think you want "and".

 
>   Do I use v.type on the 'b' map to convert the area
> to boundary lines?

no


Hamish