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<TITLE>Re: [Benchmarking] ECW data set, a proposal</TITLE>
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There is space in the server for additional disks. If you’d like to try a BIG file, I have a 2tb drive available. You might want to ship the image rather than transfer over network.<BR>
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-joel<BR>
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On 7/28/09 11:26 AM, "Frank Warmerdam" <<a href="warmerdam@pobox.com">warmerdam@pobox.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:10pt'>Andrea Aime wrote:<BR>
> Hi,<BR>
> I was wondering what can we use as the ECW data set.<BR>
> I have on my disk a BlueMarble NG ECW image which I downloaded<BR>
> back at the times when geotorrent.org was still alive and kicking,<BR>
> gdalinfo reports:<BR>
><BR>
> gdalinfo world-topo-bathy-200408-3x86400x43200.ecw<BR>
><BR>
> Driver: ECW/ERMapper Compressed Wavelets<BR>
> Files: world-topo-bathy-200408-3x86400x43200.ecw<BR>
> Size is 86400, 43200<BR>
...<BR>
<BR>
Andrea,<BR>
<BR>
I think this would be a nice sort of medium sized image to work with.<BR>
I think we *might* still want a big image. /me checks ... If I read the<BR>
"df" output right there is 380GB available on the disk so I guess I had<BR>
better not go too crazy about big images.<BR>
<BR>
> I guess it could be interesting for the ECW benchmarking. As for turning<BR>
> it into a mosaic of TIFFs for the mosaic part heh, that will be a little<BR>
> painful, especially since the tiles need to be less than 2GB (last<BR>
> time I tried I think I had to limit myself to North America to be able<BR>
> and extract a file of less than 2GB, uncompressed).<BR>
<BR>
There should be no problem translating the image to bigtiff.<BR>
<BR>
> If people think it's good I can upload it to the server.<BR>
<BR>
Please do. I can work on converting it to some other formats<BR>
once it is there.<BR>
<BR>
> Oh, btw, what's the MapServer status vs jpeg compression? Shall we<BR>
> use JPEG compressed or just go for the uncompressed TIFFs?<BR>
<BR>
I am hoping to deploy this image in a few raster formats to<BR>
investigate the performance effects in MapServer. One of those<BR>
will likely be tiled, jpeg compressed TIFF which is popular<BR>
with at least one prominent MapServer user.<BR>
<BR>
I have even vaguely contemplated trying to deploy an image using<BR>
the new postgres WKTRaster extension. I have a GSoC student working<BR>
on this in GDAL and I have yet to even try his code! But that might<BR>
be a bit much to bite off for now.<BR>
<BR>
Best regards,<BR>
--<BR>
---------------------------------------+--------------------------------------<BR>
I set the clouds in motion - turn up | Frank Warmerdam, <a href="warmerdam@pobox.com">warmerdam@pobox.com</a><BR>
light and sound - activate the windows | <a href="http://pobox.com/~warmerdam">http://pobox.com/~warmerdam</a><BR>
and watch the world go round - Rush | Geospatial Programmer for Rent<BR>
<BR>
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