[GRASS-user] Need Help with speeding up v.import and reducing/removing null values from v.rast.stat results

[Mehrdad Varedi]

Hi Everyone,

I am trying to import few layers with nearly 700,000 buffer areas around
the same number of points. Fr each layer t takes more than 4-5 hours and
most of the time, it just stops in the middle of the process.
Any idea that which kind of layers can be imported with a faster speed? I
need o load 4-5 of such layers and it is now 5 days that I am busy with
building a buffer or importing the results.

Actually I tried v.buffer and it took more than a day until I stopped the
procedure, although I could create the layer with Fixed distance buffer
function in QGIS in 10 minutes.

Any idea to accelerate the process of v.buffer ot v.import in GRASS?

Also I want to calculate statistics in each of the buffers and have the
same issue with
v.rast.stats function

Another issue with this function is a lot of NAs in the result. No hole
exists in the raster files and it should be something with snapping I guess
which results in removal of many points.

Any idea or solution would be appreciated.

Kind regards,

Mehrdad



Mehrdad Varedi, M.A.Sc.
Waterlix <http://www.waterlix.com> Founder
www.waterlix.com
Cell: +1 (519)722-7057
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