[Qgis-developer] ECW!!!

[kimaidou]

Here is a very documented blog post about the comparative use of ecw or
compressed gtiff

http://blog.webmapper.com.au/

You can use basic gdal command line to get a compressed gtiff from ecw,
with very good performances. For example :

# convertir l'ecw
gdal_translate -of GTiff -co "TILED=yes" -co "PHOTOMETRIC=YCBCR" -co
"COMPRESS=JPEG" input.ecw output.tif
# créer la pyramide
gdaladdo -r average --config COMPRESS_OVERVIEW JPEG --config
PHOTOMETRIC_OVERVIEW YCBCR --config INTERLEAVE_OVERVIEW PIXEL
compressed.tif 2 4 8 16 32 64 128

Will provide a geotiff with great performances and not so big compared to
the ecw.

And as other suggested, open source wavelet is in progress too and must be
burried out !

Michael

2013/3/15 <jr.morreale at enoreth.net>

> On 2013-03-15 11:14, Vincent Picavet wrote:
>
>> I can understand Fred's frustration. Let's see a new plugin in OSGEO4W
>>> sooner than later.
>>>
>>
>> It's up to you then.
>>
>
> I was going to write the same thing, ECW is proprietary viper's nest, the
> work to make it usable on QGIS should be done by ERDAS or by the people
> using it.
>
> For those wanting a good wavelet format, there is OpenJPEG 2.0. If it
> doesn't fit the bill for you then they should think about supporting it
> like the CNES did instead of asking a open software to support a black box
> with a stupid license.
>
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