| Re: 941005.news-idlusers-gateway [message #2802] |
Thu, 06 October 1994 01:39 |
oe2v
Messages: 2
Registered: May 1994
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Junior Member |
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idlusers-news-gateway:
id AA25128; Thu, 6 Oct 94 09:39:19 +0100
(5.67b8/IDA-1.5); Thu, 6 Oct 1994 10:34:55 +0200
id AA47450; Thu, 6 Oct 1994 09:37:38 +0100
Xiaoming XU (xiaoming@fstghp05.tu-graz.ac.at) writes:
> We work with large amount of raster data on Indy. The question is:
> With which strategy (or trick) can we manage the data quickly?
> Now it needs 50 Minutes for opening one image (82 MB).
I can't understand this (if it is really MINUTES), by doing the following:
IDL> openr, 1, 'File.dat'
IDL> dum = assoc(1, bytarr(ncols,nrows))
IDL> img = dum(0)
I load for example the first band of a raster file with 6100 columns and 8260 rows
(i.e. 50 MB) on our IBM RS6000/990 in less then 5 seconds into memory. On the IBM
550 it takes a little longer but less then 30 seconds in any case.
Peter
************************************************************ *************
* *
* PETER STROBL, Geophysicist *
* German Aerospace Research Establishment *
* Institute for Optoelectronics *
* Oberpfaffenhofen *
* Wessling 82234 GERMANY *
* Phone : +49 8153 281533 *
* Fax : +49 8153 281458 *
* EMAIL : OE2V@DV.OP.DLR.DE *
* *
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