mirror of
https://github.com/Ponce/slackbuilds
synced 2024-12-01 01:00:03 +01:00
3bcd96afdc
Signed-off-by: Dave Woodfall <dave@slackbuilds.org> Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>
33 lines
1.4 KiB
Text
33 lines
1.4 KiB
Text
libecwj2 is a library that gives support to GDAL for reading, import,
|
|
and convert raster geospatial data in non-free ECW and JPEG 2000
|
|
formats. This library was released as free and open source in 2006 by
|
|
Earth Resource Mapping, formerly owner of ECW patents.
|
|
|
|
ECW (Enhanced Compression Wavelet) is a full proprietary standard of
|
|
compression image format.
|
|
JPEG 2000 (or JP2) is a similar standard under free concession but
|
|
protected by patents in some parts.
|
|
|
|
Both the formats are more powerful than other formats in lossy
|
|
compression of large image data without significant losses of quality,
|
|
but are mainly accessible through proprietary software, specially to
|
|
manage geospatial data.
|
|
|
|
libecwj2 is the only one free and open source library that includes
|
|
the support to these formats in GDAL and indirectly in platforms that
|
|
require it as dependency (i.e. QGIS and Orfeo Toolbox). GDAL can be
|
|
also used to convert ECW or JP2 files in other graphic formats.
|
|
|
|
After the installation, to apply the support to ECW/JP2 formats, GDAL
|
|
must be rebuilt without any other setting: libecwj2 is an optional
|
|
dependency autodetected.
|
|
|
|
To verify if the plugin is enabled, you can launch the following
|
|
command:
|
|
|
|
$ gdalinfo --formats | grep ECW
|
|
|
|
If the plugin is successfully enabled, this command returns
|
|
|
|
ECW -raster- (rw): ERDAS Compressed Wavelets (SDK 3.x)
|
|
JP2ECW -raster,vector- (rw+v): ERDAS JPEG2000 (SDK 3.x)
|