Hello, I would like to know if there is any free softwares (for windows), "easy to use" that can perform spheric variogram fitting cross-variogram co-krigging ...
573
Isobel Clark
drisobelclark@...
Apr 10, 2002 9:42 am
Rubens Your approach has been long used in hydrology and similar fields with much success. The problem with the standard deviation is that it does not include...
574
Isobel Clark
drisobelclark@...
Apr 11, 2002 7:56 am
Alessandro Thanks for the contribution. If Universal Kriging is applied, there is no need for simulation or multi-indicator approaches to get a standard error,...
575
José Quintín Cu...
cuador@...
Apr 12, 2002 8:03 am
Dear all, I'm working with data from Lateritic Ni Deposits. I want to know what is the exploration grid traditionally in this type of deposits. I ask this...
576
Gregoire Dubois
aigeostats
Apr 15, 2002 8:09 am
Dear all, in the case you send a question to the list, may I remind you to post a summary of any useful responses ? This good old tradition does not seem to be...
577
José Quintín Cu...
cuador@...
Apr 15, 2002 8:09 am
Hi all The answers I have received about the subject Ore Reserves Classification are listed below: Thanks everyone. José Quintín José Quintín Cuador Gil ...
578
Ercan Yesilirmak
ercanyesilirmak@...
Apr 15, 2002 2:01 pm
Dear list members My question is as follows: In my exercise, semivariance value is at near zero high at first lag, then in second lag jumps to the highest...
579
Sigrun Kværnø
sigrun.kvarno@...
Apr 17, 2002 3:06 am
** Reply Requested When Convenient ** Dear colleagues, I don't have much experience with geostatistics, but from now on I will use it in my PhD-study on...
580
Chaosheng Zhang
Chaosheng.Zhang@...
Apr 17, 2002 3:07 am
Ercan, There might be two problems in your data set. (1) The sample number is too small. (2) The are some high value outliers in your data set. I understand...
581
William Thayer
thayer@...
Apr 17, 2002 4:05 am
The replies I received to my request appear below, along with the original request for help. Thanks to those who replied. Original request: I am interested in...
582
Sibylle Eisenberger
s.eisenberger@...
Apr 17, 2002 4:21 am
Hi! Please find below my original message and the list of answers to my question concering the transformation of negative binomial data deriving from weed...
583
uleopold
uleopold@...
Apr 17, 2002 4:24 am
Either use Gstat (www.gstat.org) or/and gslib (www.gslib.com). Both maybe not as user friendly in the sense of nice GUIs as the software you used so far. but...
584
Yetta Jager
zij@...
Apr 17, 2002 7:38 am
Hi Sibylle: Sorry this is so late, but I have just been working on generating a negative binomial as described by Pielou, Cressie and others (e.g., Diggle, ...
585
mbf@...
Apr 17, 2002 7:52 am
Dear Stuart. I good reference paper is: Geostatistical Simulations of regio0nalized Pore-Size Distributions Using Min?Max Autocorrelation Factors. A. J....
586
Masters, Stuart (TS)
Stuart.Masters@...
Apr 17, 2002 9:55 am
Dear List, I'm looking for references concerning the theory and application of Maximum Autocorrelated Factors for the analysis of multielement resources. Can...
587
Masters, Stuart (TS)
Stuart.Masters@...
Apr 18, 2002 7:36 am
Dear List, Here are the responses I have received to date concerning the matter above. Thanks to all Stuart ================================================== ...
588
Juliann Aukema
aukemaj@...
Apr 22, 2002 7:48 am
Hello, I am planning out a sampling design for a study in which I am charged with assessing spatial heterogeneity (of understory vegetation) in an ...
589
Isobel Clark
drisobelclark@...
Apr 22, 2002 7:48 am
Javier ... The sill of the calculated semi-variogram is an estimate of the true variance of the data (if stationary) which is based on the assumption that ...
590
Javier
andresjavier.garcia@...
Apr 22, 2002 7:48 am
Hi all; I guess this is a very simple question: Is it supposed the sill is always the variance of the set of data? If so, is it always better to perform a...
591
Pierre Goovaerts
goovaert@...
Apr 22, 2002 7:48 am
Hi Javier, The sill of the semivariogram, if it exists, is usually not equal to the sample variance, see Journel and Huijbregt's book p. 67 or the following...
592
Ercan Yesilirmak
ercanyesilirmak@...
Apr 25, 2002 8:09 am
Dear list members Omnidirectional variogram shows a dip toward the end of lags. As far as I know this is hole effect. Would you tell me how to tackle with it? ...
593
Adrián Martínez...
amvargas@...
Apr 25, 2002 8:09 am
Dear mail list menber, What is the mathematical and practical difference between the IRF -K and the standard universal Kriging? I do these question because the...
594
José Quintín Cu...
cuador@...
Apr 25, 2002 8:10 am
Dear list members, I have performed some conditional simulation from a data set. Can I be sure that the simulations are stationary and ergodic?. José Quintín...
595
Isobel Clark
drisobelclark@...
Apr 25, 2002 8:10 am
... Ercan What is your maximum 'lag' compared to the size of your study area? If the maximum lag is more than one-half (some people say one-quarter) of the...
596
Chaosheng Zhang
Chaosheng.Zhang@...
Apr 29, 2002 8:01 am
Dear list, First, I would like to say thank you to Gregoire for keeping this list alive. I'm trying to do "risk assessment", and I have some questions about...
597
Pierre Goovaerts
goovaert@...
Apr 29, 2002 8:01 am
Hello, In the past few years stochastic simulation has been increasingly used to produce probability maps. To my opinion it's generally a waste of CPU time...
598
Munroe, Darla
dmunroe@...
Apr 29, 2002 8:01 am
Hello everyone, I apologize if this question has been asked in the past... I am compiling a list of helpful statistics textbooks - could you please contribute...
599
jack webster
webstrr@...
Apr 29, 2002 8:01 am
Hi list members When there is a nugget effect say c0=45, there is a discontinuity in variogram model, so that gamma(0) = 0 , but gamma(0.0001) = c0 (=...
600
Isobel Clark
drisobelclark@...
Apr 29, 2002 8:01 am
Jack There is a schism in the geostatistical community between those who do and those who don't make gamma(0) equal to 0. Some people argue that the nugget...
601
Chaosheng Zhang
Chaosheng.Zhang@...
May 2, 2002 10:03 am
Pierre, Thanks for the comments. It's my first time to use Gaussian simulation to do something possibly useful, and I have also found the calculation quite...
