RE: [ai-geostats] Calculation of fields in models

[Colin Badenhorst]

Hi Perry,   Well, I tend to stick with the simple calculation. Which values would you use to interpret Z.   Off the cuff, I'd day just stick with the calculation, because :   1. It will be much quicker than interpolating Z - time, time, time! 2. If the relationship is X+Y then a simple calculation is completely acceptable from an auditors point of view, therefore standard/common practice. 3. No need to define and test the Z interpolation method - time, time, time!   Hope this helps.   Regards, Colin -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: 06 August 2005 05:50 To: ai-geostats@unil.ch Subject: [ai-geostats] Calculation of fields in models 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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