[GRASS-user] new addon for multivariate surface interpolation from sparse points with smoothing

[Markus Metz]

On Fri, Aug 26, 2016 at 1:24 AM, Sajid Pareeth <spareeth at gmail.com> wrote:
> Hi Markus
>
> Thank you for this excellent addon.
>
> I was testing it with some trmm data, and getting this error with default
> "thin" value of 1.5.
>
> ERROR: knn: inserting duplicate

This has been fixed in r69117,8 in relbr7, trunk, you need to update
your local copy of GRASS

>
> Then if I increase the thinning factor, it works, but the algorithm thinned
> out quite a lot of points.

That could be desired.

Markus M

>
> Any lead would be helpful, thanks
>
> Regards
>
> Sajid
>
>
>
>
> On Thu, Aug 25, 2016 at 9:02 PM, Markus Metz <markus.metz.giswork at gmail.com>
> wrote:
>>
>> The new addon v.surf.tps performs multivariate thin plate spline
>> interpolation of sparse points with smoothing. If you ever wondered
>> why worldclim data (http://worldclim.org) follow so nicely elevation,
>> the reason is multivariate thin plate spline interpolation of
>> meteorological station data with elevation as a covariate. The module
>> can also be used for gap filling of remote sensing data, e.g. MODIS
>> LST reconstruction of cloud-covered areas, after fine-tuning the
>> module's parameters. The module works only with GRASS 7.2+.
>>
>> Markus M
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>
>