[GRASS-user] v.to.rast with text column

[Achim Kisseler]

Hi Dylan,

v.to.rast has the option:

--%<--
labelcolumn=name
    Name of column used as raster category labels
--%<--

And the raster values have to be numeric:

--%<--
column=name
    Name of column for attr parameter (data type must be numeric)
--%<--

(http://grass.itc.it/grass64/manuals/html64_user/v.to.rast.html)

Try to make unique numbers from your string-column and convert them with
column=... and labelcolumn...

Achim


Dylan Beaudette schrieb:
> Hi,
> 
> v.to.rast is letting me know that it does not accept text columns in an 
> attribute table. Has anyone figured out a simple approach to making this 
> work? I suppose that I could import the data into R, convert to factors, save 
> the levels back to the table and use those... but there may be something out 
> there that is simpler and can be done within GRASS. Also, would this be 
> something worth adding to the v.to.rast code?
> 
> Cheers,
> Dylan
>