Re: AI-GEOSTATS: Block size - estimation variance - resource category.

2001-03-16 Thread Isobel Clark
--- William Thayer <[EMAIL PROTECTED]> wrote: > Isobel: > Would you mind expanding a little on your earlier > reply? In particular, > what do you mean by (1) "kriging variance less than > ordinary > >statistical sample variance", (2) "not measured but > within the range > >of influence of at lea

Re: AI-GEOSTATS: Block size - estimation variance - resource category.

2001-03-16 Thread Isobel Clark
Digby, at last a real question! > Is use of estimation variance for classification of > resource confidence e.g the AusIMM's resource > categories of Measured, Indicated and Inferred > common and is this good practice. Depends on how you use it, whether your estimates and errors have Normal dis

AI-GEOSTATS: Block size - estimation variance - resource category.

2001-03-16 Thread Digby Millikan
Hello,  Is use of estimation variance for classification of resource confidence e.g the AusIMM's resource categories of Measured, Indicated and Inferred common and is this good practice. Also how is this effected by block size in that should a reasonable block size be chosen e.g. 1/4 drillhol