Image with *.rrd format ?

Folks
Hi
I have some images with .rrd format (one image consist of 3 file: rrd
+aux+dt2). Does any one have experience with this kind of data, that
how we can import it to IDL (or ENVI)?
Any help?
Cheers
Dave

On Aug 27, 5:38*am, d.po...@gmail.com wrote:
> Folks
> Hi
> I have some images with .rrd format (one image consist of 3 file: rrd
> +aux+dt2). Does any one have experience with this kind of data, that
> how we can import it to IDL (or ENVI)?
> Any help?
> Cheers
> Dave

I found this: http://tinyurl.com/5kujdn It might help - you might
have to build your own.

On Wed, 27 Aug 2008 03:38:35 -0700 (PDT), d.poreh@gmail.com wrote:

>Folks
>Hi
>I have some images with .rrd format (one image consist of 3 file: rrd
>+aux+dt2). Does any one have experience with this kind of data, that
>how we can import it to IDL (or ENVI)?
>Any help?
>Cheers
>Dave

This is Elevation Data no?

dt2: Digital Terrain Elevation Data (level2)
rrd: Reduced Resolution Dataset (pyramid file which helps the image
display faster)
aux: Auxiliary file (color map, coordinate system, projection
info,...)

This might help to decode the dt2 file:
http://en.wikipedia.org/wiki/DTED
http://www.nga.mil/ast/fm/acq/89020B.pdf

For the aux file, I don't know:
http://tinyurl.com/5unxyj

I don't think the rrd file is obligatory (but I'm not a specialist).

> I don't think the rrd file is obligatory (but I'm not a specialist).

it is not. I believe it is only used in ArcGis...
Jean

On Aug 27, 6:12*pm, Jean H <jghas...@DELTHIS.ucalgary.ANDTHIS.ca>
wrote:
> > I don't think the rrd file is obligatory (but I'm not a specialist).
>
> it is not. I believe it is only used in ArcGis...
> Jean
Thanks a lot.
Cheers