Dear listers, I want to investigate the spatial properties of point patterns which can possibly be described as results of Levy Flights, i.e. Brownian motion ...
Hello, A summary of replies about my question concerning that there is uncertainty in our experimental variograms, I also raised the point that this...
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 ...
Dear All Here is a call for abstracts for a special session at the forthcoming GeoComputation'03 conference to be held on 8-10 September 2003 in Southampton,...
Check out the software links from www.ai-geostats.org (there is a search engine). I would go for Gstat (www.gstat.org) or GSLIB Gregoire ... -- * To post a...
The following paper might also be interesting (it is also stored on the AI-GEOSTATS web site, topic: online papers) "Performance comparison of geostatistical...
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 ...
Because the book about Variowin is out of print, I have asked the author Yvan Pannatier if I could put the help file of the previous version (2.1.)of the ...
Gregoire, Although I haven't looked at the paper for a long time, I believe that there is a description of the rodogram in the following paper presented at...
I'm interested in multivariate spatial data expecially geostatistical data. Where can I find simulations using cokriging? Thanks. Aldo -- * To post a message...
Hello, Continuing my discussion on variograms, I was wondering if anyone can suggest any sites which display what data looks like for different variogram...
Hello, When one calculates an experimental variogram used for spatial modelling one averages the semivariogram values at each distance. This value is just an...
Dear list members---------- Have any of you modified the GSLIB program cokb3d to perform cross validation? If so, would you be willing to provide me with the...
Dear All: I´m working with a Au gossan deposit. The data come from grade control of 8 benches in the mine. All the histograms show evidences of bimodality...
Is there any specific reason for you to use GeoEas for cross-validation? I have no experience with your kind of problem, but I'd say try using GSLIB for...
Thanks to Pierre, Chris, Donald, Vassily and Tom for their suggestions in my problem with GeoEas data files under W-XP. Saving the data file in GeoEas format...
Dear all, From now on, announcements of CONFERENCES and FREE SOFTWARE can be sent to the mailing list but only after my approval. Therefore, I will ask you to...
Hello, My name is Janusz Szmyt. I am looking for scientists who are interested in the spatial distribution of trees within stands. Regards, Janusz [Non-text...
Hello everyone, Here is a summary of my question about information on lognormal distributions in mining. ... Jeff Myers wrote: I can't help on the reference,...
Dear list members: I run into problems when creating data files with Excel 2002 for use in Variowin 2.2 Prevar2d module. Variowin says it finds an 'error while...
Hello, I was wondering if someone could give me recommendations on 'Lognormal Distributions: Theory and Applications' Edwin L. Crow for one interested in...
Hi David, I have designed the Gecko underground mine optimally from a block model (Gecko Mine N.T. 80 stopes). It is easier than pit optimisation because you...
Hello, I was hoping advice could be given on the following problem. We store nickel (eg 0.40 Ni %) and mill recovery (55.45%) in our mine model. From this we ...
Hello, Does anyone know the first paper to discuss the covariogram or twin variogram in relation of variability of grades with distance in orebodies. Regards...
David, If you want clarification of any of these points please do not hesiate to contact me. This is the method employed at all mines where stope design is...
Brian There is an immense amount of literature on mixtures of distributions, generally Normal or lognormal. Unfortunately, I don't have my 1974 paper up on the...
Hola dear Mail List Friends. I have some problems with the treatment to the "Negativity Pints" that cause negatives Kriging coefficients: Z=Sum [Landa(i) *...
... Yes. The model must be fitted my maximum likelihood. ... The algebraic expression for the AIC results from the bias in the maximum log-likelihood of a...
