The Export ECW command allows the user to export any loaded raster, vector, and elevation grid data sets to an ECW file. ECW files are highly compressed and great for storing things like satellite imagery. There is no size restriction on exported ECW files, so you can store many terabytes worth of imagery within a single highly compressed ECW file.

When selected, the command displays the ECW Export Options dialog which allows the user to setup the export.

Target Compression

If you would like to generate an uncompressed format file, simply slide the Target Compression Ratio slider all the way to the left (1:1 target compression ration).

Band Setup

  • Default RGB Layout- This option generates a 3 band RGB ECW with 8-bits per band
  • Grayscale- This option generates a 1 band image with 256 scales of gray ranging from black to white.

Metadata File Formats to Generate

Select any additional metadata or projection files to be produced with the ECW export.

Other Options

Save Map Layout

The distance scale, elevation legend, and coordinate grid will be saved to the file (except when exporting elevation grids) if they are configured to show up in the main display.

Save Vector Data if Displayed

Any loaded vector data that is configured to show up in the main display will be saved to the image file (except when exporting elevation grids).

Interpolate to fill small gaps in data

Any small areas with missing data will be filled in by interpolating the surrounding valid data using an IDW method. This is useful for filling small gaps between adjacent tiles or small holes in elevation data.

Make Background (Void) Pixels Transparent:

An alpha channel will be added to the file to indicate which pixels should be treated as transparent.

Include Projection/Datum in Header

The projection information will be saved to the ECW header.

Save ECW Projection Name as EPSG:XXXX

The projection and datum name saved in the ECW header will be formatted as ESPG:XXXX