[Benchmarking] ECW data set, a proposal

[Schlagel, Joel D IWR]

There is space in the server for additional disks.   If you¹d like to try a
BIG file, I have a 2tb drive available.  You might want to ship the image
rather than transfer over network.

-joel

On 7/28/09 11:26 AM, "Frank Warmerdam" <warmerdam at pobox.com> wrote:

> Andrea Aime wrote:
>> > Hi,
>> > I was wondering what can we use as the ECW data set.
>> > I have on my disk a BlueMarble NG ECW image which I downloaded
>> > back at the times when geotorrent.org was still alive and kicking,
>> > gdalinfo reports:
>> >
>> > gdalinfo world-topo-bathy-200408-3x86400x43200.ecw
>> >
>> > Driver: ECW/ERMapper Compressed Wavelets
>> > Files: world-topo-bathy-200408-3x86400x43200.ecw
>> > Size is 86400, 43200
> ...
> 
> Andrea,
> 
> I think this would be a nice sort of medium sized image to work with.
> I think we *might* still want a big image.  /me checks ... If I read the
> "df" output right there is 380GB available on the disk so I guess I had
> better not go too crazy about big images.
> 
>> > I guess it could be interesting for the ECW benchmarking. As for turning
>> > it into a mosaic of TIFFs for the mosaic part heh, that will be a little
>> > painful, especially since the tiles need to be less than 2GB (last
>> > time I tried I think I had to limit myself to North America to be able
>> > and extract a file of less than 2GB, uncompressed).
> 
> There should be no problem translating the image to bigtiff.
> 
>> > If people think it's good I can upload it to the server.
> 
> Please do.  I can work on converting it to some other formats
> once it is there.
> 
>> > Oh, btw, what's the MapServer status vs jpeg compression? Shall we
>> > use JPEG compressed or just go for the uncompressed TIFFs?
> 
> I am hoping to deploy this image in a few raster formats to
> investigate the performance effects in MapServer.  One of those
> will likely be tiled, jpeg compressed TIFF which is popular
> with at least one prominent MapServer user.
> 
> I have even vaguely contemplated trying to deploy an image using
> the new postgres WKTRaster extension.  I have a GSoC student working
> on this in GDAL and I have yet to even try his code!   But that might
> be a bit much to bite off for now.
> 
> Best regards,
> --
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | Geospatial Programmer for Rent
> 
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