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Re: ENVI File Question [message #55794 is a reply to message #55788]

Wed, 12 September 2007 13:51

Jean H.
Messages: 472
Registered: July 2006

Senior Member

David Fanning wrote:
> Folks,
>
> I have an ENVI file question. I just want to open a Geotiff
> file, do some small amount of processing on it, and save
> it as an image file ENVI can read. This seems about as
> straightforward as it can be.
>
> I found an ENVI procedure named ENVI_SETUP_HEAD that looks
> like what I need to create the ENVI header for this very
> simple file. My program runs, my ENVI_SETUP_HEAD command
> gets called. All appears well, but the header file never gets
> created. (Or at least it doesn't get created in the same
> place as my image file!)
>
> Here is the output from my program:
>
> Image Filename: /home/fanning/b2.img
> ENVI Header Filename: /home/fanning/b2.img.hdr
>
> The image file is there. The header file is not.
>
> Do I have to do something else to write the header?
>
> Cheers,
>
> David

David,

You can write the image AND the header at the same time, using
ENVI_WRITE_ENVI_FILE

here is an example... please note that some info has been read when
opening another file (the headerInfo structure)... I am not sure how to
build the map info on its own!

ENVI_WRITE_ENVI_FILE, data, data_type=1, nb = nbBands, nl=data_sizeY, $
ns=data_sizeX,OUT_NAME = workingDirectory + "fileName.dat", $
BNAMES = "band Name", class_names = headerInfo.class_names, $
lookup=headerInfo.lookup, map_info=headerInfo.map_info,num_classes =
headerInfo.num_classes

jean

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[Message index]

		Re: ENVI File Question By: David Fanning on Wed, 12 September 2007 15:43
		Re: ENVI File Question By: David Fanning on Wed, 12 September 2007 15:40
		Re: ENVI File Question By: Jean H. on Wed, 12 September 2007 13:51
		Re: ENVI File Question By: David Fanning on Wed, 12 September 2007 14:04

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