[postgis-users] Rain sensor --- Interpolation -- RASTER -- IDW

Giuseppe Broccolo g.broccolo.7 at gmail.com
Sat May 2 13:22:17 PDT 2020

Hi Acaymo,

In some way, it is expected: the algorithm needs to loop on all the pixels
for the interpolation,
and this can be time consuming in case of large rasters, specially if you
consider that st_invdistweight
is a function implemented in PL/pgSQL.

Anyway, did you consider to split the raster in tiles, and run the
interpolation on the single tiles?

Hope this can help,

Il giorno sab 2 mag 2020 alle ore 19:00 caymo04 <caymo04 at fuerteguineo.eu>
ha scritto:

> Good afternoon everyone,
> I am trinig to interpolate on RASTER the no data values.
> We have 10 data from rain sensor and this sensor are geopositioned on the
> How can I do the interpolation by weight in all RASTER?
> I tried to do with InvDistWeight4ma function but is very very very slowly.
> Any response will be very appreciated.
> Best regards and thanks you in advance.
> Acaymo.
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