[GRASSLIST:4658] uncertainty on spatial aggregation using Thiessen polygons

[wouter buytaert]

Hello,

I'm aware that my question is not really GRASS related, but none of our
GIS experts can help me, so I hope someone here can point me to a
relevant paper or study.

I want to aggregate daily rainfall data of 3 rain gauges in a small
catchment for input in a lumped hydrological model
Herefore, I am using a weighted average, based on the relative area of
the respective Thiessen polygons.

Now I'm looking for a technique to determine the uncertainty on the
result, based on the variability between the 3 rain gauges.

If someone can help me, this would be greatly acknowledged!

Thanks,

Wouter Buytaert