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Re: GridData Conundrum [message #70598 is a reply to message #70476]

Thu, 22 April 2010 05:35

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

On Apr 21, 3:23 pm, David Fanning <n...@dfanning.com> wrote:
> David Fanning writes:
>> Just one more surprise to report. If I use the GridData
>> Natural Neighbor method (instead of the Nearest Neighbor
>> method), the result is indistiguishable from the Contour
>> method!
>
>> I've updated my web page to report the new results:
>
>> http://www.dfanning.com/code_tips/usegriddata.html
>
> Having GridData working is like living in the land of
> milk and honey. But there is one disturbing fact that
> lurks like a snake in the garden. I get different
> results from GridData depending upon what machine
> I run the identical code on. :-(
>
> In particular, the Modifed Shepard's algorithm blows
> up (no other way to describe it) on my Windows 64-bit
> machine, while it seems to work reasonably well on
> my 32-bit LINUX machine.
>
> Can anyone think of any reasonable explanation for this?
> I show some results at the end of this article:
>
> http://www.dfanning.com/code_tips/usegriddata.html
>

Hi David,

It doesn't look to me like you are running the coordinates through
GRID_INPUT before passing them to GRIDDATA. In the past I found that
(generally) removed all subsequent potholes from the GRIDDATA process.

Cheers,
Ben

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[Message index]

		GridData Conundrum By: David Fanning on Sat, 17 April 2010 10:19
		Re: GridData Conundrum By: David Fanning on Mon, 19 April 2010 13:46
		Re: GridData Conundrum By: David Fanning on Wed, 21 April 2010 12:23
		Re: GridData Conundrum By: David Fanning on Mon, 19 April 2010 11:52
		Re: GridData Conundrum By: Klemen on Mon, 19 April 2010 07:44
		Re: GridData Conundrum By: David Fanning on Mon, 19 April 2010 07:03
		Re: GridData Conundrum By: David Fanning on Thu, 22 April 2010 06:07
		Re: GridData Conundrum By: ben.bighair on Thu, 22 April 2010 05:35

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