I have an .ecw file. I want to pyramid this file and use in my app. How Can I do it with GDAL?

Note: My file is greater then 4 GB.

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    ECW files contain internal overviews, you shouldn't need to ever update them because they're not generally editable.. if you have an ECW editor it should update the overviews on save. The cutoff for 'free' ECW creation is 50MiB measured by rows x columns x bands, anything larger than that you will need to purchase a license. – Michael Stimson May 23 '18 at 4:57
  • How can I read this internal overviews? – Morteza Malvandi May 23 '18 at 5:00
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    You don't. If you're building an application with GDAL (or other API) it will do it for you; it's in the DLL file for the driver. If you want a tileset then use the GDAL2Tiles.py utility gdal.org/gdal2tiles.html but first make sure your python is installed and working properly with your GDAL. – Michael Stimson May 23 '18 at 5:02
  • @MichaelStimson Can you show an example? – Morteza Malvandi May 23 '18 at 5:52
  • No, from the application side there's nothing to see when reading an ECW for display. As for GDAL2Tiles.py I've not used it much as I don't do web development. – Michael Stimson May 23 '18 at 22:05

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