[GIS] Enabling Erdas ECW files in gdal

ecwerdas-imaginegdal

I want to enable read support from Erdas ECW files in gdal on windows.

I have GDAL binaries from here and I also have a self compiled version.

When compiling myself I have found the options in nmake.opt and could add support myself, but if its possible I would rather add it to the precombiled distribution from gisinternals. Is this possible? Or will I need to compile it my self?

Best Answer

For read access the easiest way to get ECW support is through the OSGeo4W installer. Do an Advanced install, and in the libs section enable the gdal-ecw library.

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[GIS] Importing ECW into PostGIS database with raster2pgsql (windows)

The workaround is to use another GDAL that has ECW compiled and convert to a format that raster2pgsql supports. I suggest looking at the http://www.gisinternals.com/sdk/ Those are built whenever a change in GDAL and have ECW support I believe.

Unfortunately the gdal that raster2pgsql is packaged with is incompatible with the VC+ build ones and the gdal just has the basic formats that don't require us adding extra depency files. So you can't just replace the gdal dll.

We are the package maintainers for windows PostGIS. Others have voiced similar issue. We are planning to in future have a version of gdal built with VC that is swappable for those who need it.

We don't plan to compile proprietary support in the stackbuilder distributed GDAL for obvious reasons and also it makes the packaging not as light weight.

[GIS] Using ECW with mapserver

After hours of compiling, i found my mistake...

Nothing related to compilation. The problem was my mapfile. I had a layer definition that look like :

MAP
  SHAPEPATH /my/absolute/path
  [...]

  LAYER
    DATA "../my_file.ecw"
    [...]
  END
END

If i give absolute path in layer definition, mapserver work perfectly. It work with shapefile, but not with ecw. My mistake, SHAPEPATH is rather explicit.

Best Answer

Related Solutions

[GIS] Importing ECW into PostGIS database with raster2pgsql (windows)

[GIS] Using ECW with mapserver

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