[GRASS-user] v.surf.rst limitations?

[Roberto Antolin]

Hi Carlos and Mike,
At this moment, there is actually a limitation with v.surf.bspline. 
There is a bug and I think it is no possible working with 13.5 mill 
cells. I'm working on it, but by the moment It will reach only 4mill 
cells. Yes, I know it is no enough, sorry. I hope that in a near future 
this will be also fixed. Maybe, if you try with a lower resolution 
(about 20m) v.surf.bspline should work.

However, I think v.surf.bspline will be faster than v.surf.rst. ;-)

Regards,
Roberto.

Michael Perdue ha scritto:

> Carlos,
>
> To the best of my knowledge, the only limitation on v.surf.rst is 
> imposed by the limits of your hardware. IE, your probably running into 
> memory allocation problems. You can try increasing your swap space, 
> but be aware that v.surf.rst will take a painfully long time to 
> process that many points. Alternately, I'd recommend you give r.in.xyz 
> and v.surf.bspline a try.
>
> Cheers,
>
> Mike
>
> On 4-Dec-06, at 3:49 AM, Carlos "Guâno" Grohmann wrote:
>
>> Hello, I have this LIDAR dataset with abou 5.5 millions points that I
>> imported with v.in.ascii -ztb, and I want to interpolate in a DEM with
>> 5m resolution, which gives me about 13.5 million cells. When I try to
>> run v.surf.rst (GRASS 6.3 cvs), it get killed after 30-40 minutes. Is
>> there a limitation on v.surf.rst?
>>
>> thanks
>

-- 
Roberto Antolín Sánchez
Politecnico di Milano – Polo Regionale di Como
(Laboratorio di Geomatica V2.8)
Via Valleggio, 11 – 22100 Como, Italy
tel: +39 031 332 7533 || fax: +39 031 332 7519 
email: roberto.antolin at polimi.it