[ai-geostats] Calculation of fields in models

[PCollier]

Hi list   I would appreciate some feedback on standard/common practice for calculation of fields in models.   eg:   If I interpolate X and Y in my model from X and Y data (eg: drill holes), and I ultimately want Z = X + Y, what is the difference between calculating Z = X + Y in samples and then interpolating Z versus calculating Z AFTER X and Y have been interpolated (besides the obvious potential change in spatial characteristics of the variable)...?   Cheers Perry     Perry Collier Senior Mine Geologist Ernest Henry Mine   Xstrata Copper Australia ( (07) 4769 4527 4  (07) 4769 4555 * [EMAIL PROTECTED] " http://www.xstrata.com   PO Box 527 Cloncurry QLD 4824 Australia   "Light travels faster than sound. That is why some people appear bright until you hear them speak"   ********************************************************************** The information contained in this e-mail is confidential and is intended only for the use of the addressee(s). If you receive this e-mail in error, any use, distribution or copying of this e-mail is not permitted. You are requested to forward unwanted e-mail and address any problems to the Xstrata Queensland Support Centre. Support Centre e-mail: [EMAIL PROTECTED] Support Centre phone: Australia 1800 500 646 International +61 2 9034 3710 **********************************************************************

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