[GRASS-dev] Re: [GRASS-user] Maximum number of points for v.what.rast

[Moritz Lennert]

On 30/04/11 21:50, Rebecca Bennett wrote:
> hello there,
>
> Does anyone know the maximum number of points that v.what.rast can handle?
> I have a file of 600,000+ points that fails to run (12hrs 100% CPU and
> nothing) and I wonder, before I start with trial and error, if anyone
> knows the answer?

There is no fixed maximum number of points. My guess would be that the 
time needed really depends on the database backend and whether there is 
an index on the category column.

Which backend are you using ? Which process is running during all this 
time ?

The module executes each individual update query one at a time. Maybe it 
might be more efficient to group them into a temporary file with the SQL 
statements and then run that all at once ?

Moritz