[Gdal-dev] read RLE BIL with GDAL?

[Brent Fraser]

Thom,

  The data was not created with ArcGIS.  In fact we wrote the software to
read and write the RLE BIL files.  These files are used to store a code for
the "original provider/quality measure" for the DEM points in our DEM
datastore (e.g 0=GTopo30,1=STRM, 2=DTED, etc), and is used when updating the
DEM datastore with data from other sources as it becomes available.

    Unfortunately, we don't have any way of visualizing these "quality
measure" files (poor planning on our part).  While the ultimate solution is
to replace our RLE BIL routines with RLE Tiff routines, I was hoping for a
quick solution by crafting up some HDR files or other GDAL-compatible header
files.

Brent

----- Original Message -----
From: "Thom DeCarlo" <T.R.DeCarlo at larc.nasa.gov>
To: <gdal-dev at remotesensing.org>
Sent: Monday, January 12, 2004 9:09 AM
Subject: RE: [Gdal-dev] read RLE BIL with GDAL?


> Yep, I knew that. I should have said RLE compression and not RLE format.
> Sorry for the confusion. I didn't realize that Brent was asking about
> something specific to ArcGIS, so I can't answer whether or not the schemes
> are the same.
>
> Sorry again,
> Thom
>
> -----Original Message-----
> From: Frank Warmerdam
> Sent: Monday, January 12, 2004 10:11 AM
> To: gdal-dev at remotesensing.org
> Subject: Re: [Gdal-dev] read RLE BIL with GDAL?
>
> Thom DeCarlo wrote:
> > Frank,
> > I don't have the right computers any more, but way back in the days of
> > yore... when I used to work on SGI hardware, there were example programs
> > that I think were part of the Image library. One of these was a
> > reader/writer for SGI's rgb image files in RLE format. Maybe there's
> someone
> > among the GDAL users that has access to those example files.
>
> Thom,
>
> RLE stands for "Run length encoded".  There are a variety of approches to
> run length encoding including stuff like the packbits compression in
> TIFF.  Do you know if the SGI RLE format used the same exact format as
> the RLE supported by ArcGIS?  If so, I might be able to dig up info on it.
> Although, it still wouldn't be too high on my priority list.
>
> Best regards,
>
>
>
>
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