Dear all, I am looking for the "ultimate"; truth about the Linear Model of Coregionalization! I want to model the variograms of variable A and B, and the ...
1260
Milo Simonic
hydroms@...
Jun 2, 1999 3:39 pm
For those who are interested in mapping groundwater quality nationwide, the on-line atlas is now available for South Africa. The http is: ...
1261
Pierre Goovaerts
goovaert@...
Jun 2, 1999 6:29 pm
Hi Gerhard, You are perfectly right that there has been a lot of confusion about the modeling of direct and cross variograms in the literature. As explained in...
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Ulrich Leopold
leop6101@...
Jun 2, 1999 7:45 pm
Dear all, I have a short question: What is the difference between a kriging estimator, say Z*(u), and the kriging estimate z*(u). Thanks in advance. Ulrich ......
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John Kern
johnkern@...
Jun 2, 1999 9:42 pm
Pierre and others, There are alternatives to the linear model of coregionalization which allow the individual covariance functions to be modeled independently...
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Pierre Goovaerts
goovaert@...
Jun 2, 1999 11:14 pm
The kriging estimator is a random variable (RV) since it is a linear combination of RVs defined at surrounding data locations, hence the use of capital...
1265
Syed Abdul Rahman/SIN...
pepsi@...
Jun 3, 1999 2:27 am
There is also the well trodden path of combinatorial optimization schemes (annealing, GAs) whereby one can flexibly model the structure of variates and...
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Jean-Louis Gelot
jlgelot@...
Jun 3, 1999 3:59 am
Sounds to be the same to me. Geostatisticians like to play with vocabulary !! Cheers Jean-Louis Gelot CGG do Brazil Geosciences Development Manager Rua Conde...
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Jean-Louis Gelot
jlgelot@...
Jun 3, 1999 4:11 am
A great software to do it right: ISATIS from Center of Geostat Fontainebleau. Cheers Jean-Louis Gelot CGG do Brazil Geosciences Development Manager Rua Conde...
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Romijn, R.
RP.Romijn@...
Jun 3, 1999 12:21 pm
I have a question on interpolating/modelling groundwatercontamination. I'm using geostatistic applications for interpolating ground- and ...
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Pierre Goovaerts
goovaert@...
Jun 3, 1999 3:24 pm
To complete the overview of techniques available for modeling coregionalization, an automatic modeling of auto and cross covariance maps using the FFT (Fast...
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Pierre Goovaerts
goovaert@...
Jun 3, 1999 4:36 pm
Hi Romijn, 3D interpolation must be done with great care in order to avoid severe artifact which may result from a poor choice of data (search strategy)...
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gerhard
gerhard@...
Jun 4, 1999 12:53 am
Thanks for the overwhelming response to my question concerning the Linear Model of Coregionalization!!! Here is a short summary of the responses I got from...
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Steven I . Citron-Pou...
sip94001@...
Jun 4, 1999 6:35 pm
Dear Gerhard: I have also started reading about coregionalization and cokriging and my take on question 2 from the literature doesn't match... ... Yes! ... In...
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Colin Daly
colin@...
Jun 4, 1999 9:45 pm
Steven et al. I think it is incontestable that in the context of a linear model of co-regionalisation that the answer to question 2 is 'YES' !!! Denis'...
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Pierre Goovaerts
goovaert@...
Jun 4, 1999 9:50 pm
Hello, As I explained in the Biology and Fertility paper, the linear model of coregionalization is built by considering a common set of basic variogram models...
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Steven I . Citron-Pou...
sip94001@...
Jun 4, 1999 10:04 pm
Dear Geostats folks: After your responses and talking to a more geostats conversant friend, I now have a better understanding of whats going on. Thanks for...
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Todd Mowrer
tmowrer@...
Jun 4, 1999 10:53 pm
Let me precede my comment with a clear statement that I would never ignore the linear model of coregionalization (LMC) in my analyses. However, there are...
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Peter Schlesinger
pschles@...
Jun 5, 1999 5:43 am
Greetings, Please advise us on recommended methods for validating our kriged surfaces. I have read some about keeping back some point samples to assess against...
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L Scott Baggett
baggett@...
Jun 5, 1999 9:07 am
Greetings, At the risk of deviating from the LMC discussion and extending to a more general problem, I would like to comment on Todd Mowrer's note and include ...
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Denis ALLARD
allard@...
Jun 7, 1999 10:20 am
... Hello Todd, it seems to me that if you seek a minimum variance estimator, an important constraint is that your variance MUST be non negative ! In this...
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Octavi Fors Aldrich
octavi@...
Jun 9, 1999 4:34 pm
Hello everybody, I'm novice using GSLIB2, and after taking a quicklook in the User's Guide, I've missed one capability in gamv.f program. When calculating...
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Ulrich Leopold
leop6101@...
Jun 11, 1999 12:05 am
Hi all, I have some question concerning the modeling. I have calculated different variogram estimators. The traditional semivariogram reveals spatial...
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Gregoire Dubois
gregoire.dubois@...
Jun 15, 1999 1:03 pm
Call for Papers for the workshop Intelligent Methods in Environmental Protection: Special Aspects of Processing in Space and Time The 13. International...
1283
Carlos Paglis
paglisca@...
Jun 16, 1999 4:18 pm
Hi; I'm having problems in running variowin w/ win98. Actually, the instalation of variowin was ok. But I 'm still getting error messages when I try to perform...
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Lara Fontanella
lfontan@...
Jun 16, 1999 6:30 pm
Hello everybody, I am looking for a spatio-temporal data set which has already been studied. The aim is to compare my model with others spatio- temporal...
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Andrew Davidson
adavidso@...
Jun 17, 1999 1:23 am
Dear all - I am hoping that some of the subscribers to this group will be kind enough to give me some (geo)statistical advice which is related to a project I...
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Gregoire Dubois
gregoire.dubois@...
Jun 21, 1999 6:32 pm
NACOG (North American Council on Geostatistics) 1999 meeting The 1999 NACOG meeting will take place in Austin, Texas on October 14th through October 17th at...
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Ulrich Leopold
leop6101@...
Jun 23, 1999 12:55 am
Dear all, if I use the indicator approach do I have to consider the declustered histogram for the indicator transform? I wonder if the indicator semivariogram...
1288
res.guest1
res.guest1@...
Jun 23, 1999 11:00 am
Dear all I'm starting with the analysis of spatial patterns and by the moment I'm using Variowin 2.2 for Windows. I've got an irregular grid of data and I...
