2014-03-04 9:22 GMT+01:00 Hans Gregers Petersen <[email protected]>:
> I would suggest that you use GDAL to:
> 1) Make a single VRT of your lib full of ECWs (see
> http://www.gdal.org/gdalbuildvrt.html)
> 2) Add overviews to said VRT, for instance 2 4 8 16 32 64 (depending
> on your usual zooms you might even go as far as 128 or 156) (see
> http://www.gdal.org/gdaladdo.html)
> 3) Load said VRT instead of using an imagemosaic
>
> That way the ECWs will only be decompressed when people want to look
> at near real resolutions (better than 1/2 resolution).
>
Hi Hans, ECW is a proprietary format with internal overviews and tiling.
In my understanding it does not require the client to decompress the whole
file for each request.
Cheers
Stefano
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