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Re: Raster to Vector [message #43459 is a reply to message #43431]

Thu, 14 April 2005 01:20

jnettle1
Messages: 27
Registered: January 2001

Junior Member

For what it's worth, I don't think the help file is wrong, I think
you've copied it wrong. I think the real problem is that you're
setting l_names wrong. In the example you're giving, values is 4096,
and then you set l_names to the same thing, so l_names is also 4096.
But l_names is supposed to be a string array (l_names stands for level
names). This is how they set it in the example code:

envi_file_query, fid, ns=ns, nl=nl, $
class_names=class_names
pos = [0]
values = [1, 2, 3]
dims = [-1, 0, ns-1, 0, nl-1]
l_name = class_names[values]

where class_names are the names of the classes in the input image.
Yours looks like this:

values = [4096] ; the DN I want to convert
l_name = [values]

Try setting l_name to 'level4096' or something and see what you get.

Jeff

Julio wrote:
> Forget it, David...
> I don't remember how many times you help me with your codes...
> Actually, this IDL group helps a lot of people due to people like you
:-)
>
> regards,
> Julio

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[Message index]

		Raster to Vector By: julio on Thu, 07 April 2005 11:20
		Re: Raster to Vector By: julio on Sun, 10 April 2005 15:37
		Re: Raster to Vector By: jnettle1 on Thu, 14 April 2005 01:20
		Re: Raster to Vector By: David Fanning on Sun, 10 April 2005 09:45
		Re: Raster to Vector By: julio on Sun, 10 April 2005 08:48
		Re: Raster to Vector By: David Fanning on Fri, 08 April 2005 09:54
		Re: Raster to Vector By: David Fanning on Fri, 08 April 2005 09:46

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