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Re: ENVI batch ROI [message #31210 is a reply to message #31139]

Wed, 19 June 2002 08:07

jdvona
Messages: 6
Registered: April 2002

Junior Member

"Peter Scarth" <p.scarth@uq.edu.au> wrote in message news:<ae3vlh$iii$1@bunyip.cc.uq.edu.au>...
> Hi John,
> This code seems to work OK in 3.5 with not-to-complex rainforest polygons.
> There was a bug in 3.2 that was fixed with SP2:
> The user procedure ENVI_DEFINE_ROI incorrectly bounded the incoming XPTS
> with number_of_lines-1 instead of number_of_samples-1
> The 3.2 service pack 2 seems to have vanished from the rsinc web site, but
> you can still get it from http://www.intersys21.com/product/alldown.html
> It might help...
> Cheers,
> Peter

Thanks for the help, but the patch didn't improve the situation. I
learned that the bug only occurs with multi-part polygons, e.g. veg
polygons that are bisected by roads, utilities right-of-ways etc,
which creates multiple pieces.
However, if I take an individual multi-part polygon, open it up in
ENVI, and convert it to an ROI using the ENVI widget, it works fine.
This means that something is obviously wrong with ENVI_DEFINE_ROI or
ENVI_MAP_CONVERT.

Too bad RSI doesn't let us peak at the code behind their functions so
I can fix this error. Is this corrected in 3.5?
John

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[Message index]

		ENVI batch ROI By: jdvona on Wed, 05 June 2002 08:13
		Re: ENVI batch ROI By: Peter Scarth on Mon, 10 June 2002 21:51
		Re: ENVI batch ROI By: jdvona on Wed, 19 June 2002 08:07
		Re: ENVI batch ROI By: jdvona on Tue, 25 June 2002 05:54
		Re: ENVI batch ROI By: Peter Scarth on Mon, 24 June 2002 22:36

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