Re: [Sgems-users] export gslib or s-gems to arcgis - surfer grid

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Pierre,

Can you offer any guidance or point me in a direction for references on 
how *best* to set the upper & lower limits, beyond "for the lower and 
upper tail extrapolation, [1] the Min. parameter must be set to a value 
smaller than the minimum sampled value, while [2] the Max. parameter 
must be set to a value larger than the maximum sampled value"? My 
thought would be to randomly sample from some distribution (of extreme 
values??) as long as the sampled value met conditions [1] & [2]. What 
are your thoughts? I have a problem where, due to the large number of 
transformations I am making, the process must be automated.

Regards,
Tom

Pierre Goovaerts wrote:
> Hi Jacco,
>  
> Hoe gaat het met u? That's practically all I remember from 8 years of Dutch..
> SGS can conduct the transform and backtransform, and you just have to check the 
> target histogram box. The trick is that for the lower and upper tail extrapolation,
> the Min. parameter must be set to a value smaller than the minimum sampled value,
> while the Max. parameter must be set to a value larger than the maximum sampled value.   
>  
> Note that you have to compute normal scores for the semivariogram model anyways..
>  
> Cheers,
>  
> Pierre
>  
> Pierre Goovaerts
> Chief Scientist at BioMedware Inc.
> Courtesy Associate Professor, University of Florida
> President of PGeostat LLC
>  
> Office address: 
> 516 North State Street
> Ann Arbor, MI 48104
> Voice: (734) 913-1098 (ext. 8)
> Fax: (734) 913-2201 
> http://home.comcast.net/~goovaerts/ 
>
> ________________________________
>
> From: sge...@li... on behalf of Jacco Wanders
> Sent: Mon 12/4/2006 2:48 AM
> To: sge...@li...; Pau...@no...
> Subject: Re: [Sgems-users] export gslib or s-gems to arcgis - surfer grid
>
>
>
> Hi Paul,
>
> Thank you for the quick reply. I managed to add coodinates to the grid with the program 'addcoord'.
> I have one important question remaining about the SGS method.
>
> It is not clear to me whether the S-Gems automatically transforms (nscore) and backtransforms the data. Do I have have to apply a nscore before hand?
>
> Hope you can help with this question.
>
> Met vriendelijke groet,
>
> Jacco Wanders
>
> ---------------------------------
> GEWIJZIGD ADRES EN TELEFOONNUMMER PER 1 JANUARI 2006
>
> Syncera GeoData
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>
>   
>>>> "Paul Walline" <Pau...@no...> 1-12-2006 17:35 >>>
>>>>         
> Jacco,
> The grid definition is given on p22 of the Deutsch and Journal GSLIB user's
> guide. Output is ordered 'point by point to the east, then row by row to the
> north, and finally level by level upward, i.e., x cycles fastest, then y,
> and finally z.' The easiest way to deal with your problem, however, is to
> use the utility program 'addcoord' which will add coordinaes to gridded
> points in the ordered GSLIB output files.
> Cheers,
> Paul Walline, NOAA Fisheries
>
>
> -----Original Message-----
> From: sge...@li...
> [mailto:sge...@li...]On Behalf Of Jacco
> Wanders
> Sent: Friday, December 01, 2006 2:41 AM
> To: sge...@li...
> Subject: [Sgems-users] export gslib or s-gems to arcgis - surfer grid
>
>
> Hi,
>
> I just managed to model the top of surface using the SGS method. I would
> like to visualize the layer in ArcGis 3D. How can i make a export of the
> file. If I save the object as a gslib file then
>  program produces just one column with values of wich I have no ides how
> they are ordered. Can someone please help me?
>
>
> Met vriendelijke groet,
>
> Jacco Wanders
>
> ---------------------------------
> GEWIJZIGD ADRES EN TELEFOONNUMMER PER 1 JANUARI 2006
>
> Syncera GeoData
> Postbus 5076
> 6802 EB  ARNHEM
>
> Bezoekadres:
> Westervoortsedijk 50
> 6827 AT Arnhem
> Tel.: +31 (0)26 751 3821
> Fax: +31 (0)26 751 3818
> Prive: +31 (0)6 5261 1877
> E-mail: JW...@sy...
> Website: www.syncera-geodata.nl
>
>
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-- 
Thomas E Adams
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
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