Dear List,
I have question regarding cokriging.
I have a dataset of 3 variables which are on a regular grid. All 3
variables are sampled at exactly the same place, and there is no
indication of strong non-stationarity. Ordinary kriging seems to do a
reasonable job at interpolation, but I was
Dear list:
I was trying to use cokriging to estimated soil N content
while using NDVI as a secondary variable. I am confused of how GSLIB arrange the
variables. Since I have more NDVI values than soil N values, Should I put both
variables in one datafile ? If not, how to arrange that?
Hello
list
I have a soil
parameter that exhibits clear spatial autocorrelation with a nice semivariogram.
I have a secondary
parameter which exhibits no spatial autocorrelation and consequentlyI can
not model any semivariogram parameters. The reason is most probably too few
data.
I´m trying to use gslib for colocated cokriging. Can someone help me abouthow to use?
Thanks for any help on this.
Joz
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Hello
Thanks to all that give me some help on the cokriging (Tom, Donald, Susan
and Tomislav). By reading Goovaerts (hello thanks for your course in
Lisbon last November) paper on precipitation estimation including
elevation, I notice that cokriging presents smooth surfaces, but I think
this
Hello,
It is my experience that, for a given data set,
the impact of secondary information is usually
more pronounced when using KED (kriging with
external drift) or SKLM (simple kriging with
local means) instead of cokriging.
Several factors will control the relative influence of
secondary
Dear all,
I'm comparing some different methods in temperature estimation, i.e. idw,
spline, ordinary and universal kriging and cokriging. I'm doing it in
geostatistical analyst (ARCVIEW 8.1), nevertheless the low errors (by
x-val) presented by all the methods, some give better results. The
Hi
I have calculated estimates of my Primary variable every 1m over a grid of
60 x 60 x 1m (i.e. 3,600 estimates) using traditional ordinary cokriging. I
am using a 20 x 20m search for the Primary variable and 18 x 18m for the
Secondary variable, and a minimum of 4, maximum of 12 Primary and
Hi, Isobel,
thank you very much for your exahustive and deeply
useful explanations!
Yes! I have something like a sill, that, if I
understood correctly, should put me on the safe side choosing to use ordinary
cokriging.
About my first question: yes! I have repeated
measures of density in
