<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=us-ascii" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 11.00.9600.19597"></HEAD>
<BODY>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>Hi Dani.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>well generally for each point in time you would need run
the kriging process separately (each monthly data set for all points counts as
one), so that would be 30*12 = 360 times ...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>So a lot of runs ... if you really wanted to do that
best would be to run that as a batch process or script it in python for the
processing toolbox...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>Another good tool to look at for such things is the R Program
<A href="https://www.r-project.org/">https://www.r-project.org/</A> and
possibly using Raster instead of vector data to create stacks of precipitation
time series...</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>However, if I where you, I might step back first and
determine what results you would like to get or which comparisons you would want
to make.... <BR>I don't know what you are after - but for example would it
make more sense to look at the differences of one month over the 30 years time
sequence to detect changes in precipitation? <BR>This would make sense if you
where to find dry versus wet years e.g. for the growing season of crops or the
like ? <BR>Let's say if July was interesting for you then you could run the
interpolations for July of each year and that way get a time sequences you can
look at to dervive your conclusions from....</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>Cheers</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>Karsten</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=168541119-03092020><FONT color=#000080
size=2 face=Arial>
<DIV align=left>
<DIV><SPAN style="FONT-SIZE: 11pt; FONT-FAMILY: 'Verdana','sans-serif'">Karsten
Vennemann<BR></SPAN><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Verdana','sans-serif'">Principal<BR><BR><SPAN
style="COLOR: #003264">Terra GIS LTD<BR>2119 Boyer Ave E
<BR>Seattle, WA 98112<BR>USA <BR><A
title="http://www.terragis.net/
blocked::http://www.terragis.net/"
href="http://www.terragis.net/"><FONT title=http://www.terragis.net/
color=#0000ff>www.terragis.net</FONT></A></SPAN></SPAN><?xml:namespace prefix =
"o" ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></DIV>
<DIV align=left>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 9pt; FONT-FAMILY: 'Verdana','sans-serif'; COLOR: #003264">Phone
++1 206 905 1711<BR>Fax ++1 925 905
1711</SPAN></P></DIV></DIV></FONT></SPAN></DIV><BR>
<DIV lang=en-us class=OutlookMessageHeader dir=ltr align=left>
<HR tabIndex=-1>
<FONT size=2 face=Tahoma><B>From:</B> Qgis-us-user
[mailto:qgis-us-user-bounces@lists.osgeo.org] <B>On Behalf Of </B>Dani
Varghese<BR><B>Sent:</B> Thursday, September 03, 2020 03:14<BR><B>To:</B>
qgis-us-user@lists.osgeo.org<BR><B>Subject:</B> [Qgis-us-user] Standard
precipitation index interpolation<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV dir=ltr>Dear All
<DIV><BR></DIV>
<DIV>I had SPI (Standard precipitation index) values for 1000 stations (30
years monthly data for each station) . I needed to perform the interpolation
method ( kriging). What confuses me is that each station/point has 30 years of
monthly data ranging from +2 to -2, Can anyone suggest to me how to interpolate
these values, thanks in advance.</DIV>
<DIV><BR></DIV>
<DIV>Best</DIV>
<DIV>Dani<BR clear=all>
<DIV>
<DIV class=gmail_signature dir=ltr data-smartmail="gmail_signature">
<DIV dir=ltr><BR>
<DIV><BR></DIV></DIV></DIV></DIV></DIV></DIV></BODY></HTML>