One of the foundation stones of geostatistics is the assumption that there
is a spatial semivariogram function which is invariant under spatial
translation. In many geological situations of interest (I might even say
'most'), this assumption is patently false. For example, in a typical
be outlawed.
- Steve
- Original Message -
From: Marcel Vallée [EMAIL PROTECTED]
To: Fran Manns [EMAIL PROTECTED]
Cc: Stephen Henley [EMAIL PROTECTED]; Isobel Clark
[EMAIL PROTECTED]; J. E. Tilsley [EMAIL PROTECTED]; AI
Geostats mailing list ai-geostats@unil.ch
Sent: Thursday, February
Good question. I guess the answer is it all depends. If the laboratory
sends back both 'below-detection-limit and 'trace' in the assay results, the
best thing is to ask them the precise definition they are using for each.
However, generally, 'below detection limit' refers to instrumental analyses
