[GRASS-user] v.to.rast "Converted points/lines: 0 of 47763"

[achim]

Thanks Hamish,

but I do have cats. I did v.clean and I tried with v.category, too. But
it doesn't help.

Maybe my cats addressing the nodes???

achim

Hamish schrieb:
> achim wrote:
>> today another question.
>>
>> My problem:
>> I converted boundaries from an area vmap to lines via
>> v.type
>> v.type input=gitter at achim output=gitter_lines
>> type=boundary,line --o
>>
>> Now I want to convert these lines to raster-cells via:
>>
>> v.to.rast --overwrite input=gitter_lines at achim
>> output=gitter_lines
>> use=cat type=line
>>
>> but nothing converts!
>>
>> Loading data...
>> Pass 1 of 2:
>> Reading features...
>> Schreibe Rasterkarte...
>> Pass 2 of 2:
>> Schreibe Rasterkarte...
>> Converted areas: 0 of 0
>> Converted points/lines: 0 of 47763
>> v.to.rast komplett.
>>
>>
>> What am I doing wrong?
> 
> boundaries typically do not have a category value (e.g. a boundary between
> two fields: which farmer owns the boundary?), but sometimes can (e.g. if
> boundary is also a road)
> 
> only items with category are processed by most vector modules (they loop
> from the first cat to the last cat). So run v.category to add cats to
> your lines and then it should work.
> 
> there is a (short) word about this in the vectorintro help file.
> 
> 
> Hamish
> 
> 
> 
>       
>