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Re: landscan data [message #47035 is a reply to message #46955]

Tue, 17 January 2006 05:09

Paolo Grigis
Messages: 171
Registered: December 2003

Senior Member

matthias.demuzere@geo.kuleuven.be wrote:
> Thanks for the reply David.
>
> I tried again to read in the whole dataset with 43200x20880 fields on
> another PC, but that didn't work either. So I probably have to look to
> see if I can expand my memory capacity....

The problem with the 32-bit versions of IDL is that no matter how much
*memory* you have in the system, you cannot allocate more than 2GB for *one*
array (the reason is likely due to the fact that internal array indexing
is done with a long signed integer, ranging up to 2^31-1).

So the maximal numbers of *elements* in one array is approximately
2^31/size, where size is the byte-size of your data type (1 for byte,
2 for int, 4 for longs etc.).

Possible solutions: break up the array in smaller chunks or switch
to 64-bit IDL versions.

Ciao,
Paolo

>
> Cheers,
> Matthias
>

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[Message index]

		landscan data By: matthias.demuzere on Sun, 15 January 2006 07:45
		Re: landscan data By: Paolo Grigis on Tue, 17 January 2006 05:09
		Re: landscan data By: Ben Panter on Tue, 17 January 2006 03:18

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