Global Mapper v25.0

exporting a elevation layer into ECW format

I have an DEM file encoded in GeoTIFF format that I'd to export to ECW to reduce the size of the file on disk. Is there a way to do this using GM?

The only option I see for exporting to ECW is via the "export to raster/image format". I tried this but our GDAL driver in our application can't read it as an elevation layer. There is no option for exporting to an elevation grid format in ECW.

Any help would be appreciated.


  • bmg_mike
    bmg_mike Global Mapper Guru Moderator, Trusted User

    While you cannot export an elevation grid as ECW, you can use the elevation export to generate a JPEG2000 Elevation Grid file, which should have comparable size to ECW and should be supported by GDAL.



    Global Mapper Guru

  • I was able to export my elevation grid in GeoTiff to a JPEG2000 file format using the response above.

    However, I'm seeing some noise in the data that I would like to set to "0" elevation rather than the random data that I'm seeing in the grid. Is there any way for me to remove the noisy data? Please see attached image to see the noisy elevation data...