AI-GEOSTATS: Random Functions

2006-07-22 Thread Digby Millikan
Hello, I am reading some geostatisitics texts, and they introduce random functions. Some texts say; A deposit D is made of a set of random variables Z(x) which make up a random function. Z(x) is hence a set of possible realizations e.g. z(x) I understand this, however in

AI-GEOSTATS: Random Functions

2006-07-22 Thread Digby Millikan
Dear list, Thanks for the replies about random functions and variables Z(x,w), I thought of a good example for w which may represent grades of a material and Z(x,w) could represent dollar values, if one for instance were modeling multiple grades. Another example may be calorific

Re: AI-GEOSTATS: KWBP Test Program

2006-07-22 Thread Raimon Tolosana
Dear list, this situation posed by Mr.Merks, in which spatial dependence is not strong enough as to be useful for geostatiscs, might be rather common. I'd like to ask to the list, what kind of estimation of reserves should be done in this case? In the absence of spatial dependence, classical

RE: AI-GEOSTATS: KWBP Test Program

2006-07-22 Thread Pierre Goovaerts
Dear Raimon, If the data are not spatially correlated, your variogram will be modeled as a pure nugget effect and all observations will receive the same weights in your block kriging estimation. If you perform a global block kriging (i.e. use of a single search window), your estimate will