Loading GeoTiff with external overviews...

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Loading GeoTiff with external overviews...

I have a GeoTiff file that has external overviews in a .ovr file. I'm trying to load this via an earth file by specifying the tif file, however, it doesn't appear that the overviews in the .ovr file are being loaded.

Is there something more I need to do to load the external overviews associated with my tif file using the earth file?

Thanks
gwaldron gwaldron
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Re: Loading GeoTiff with external overviews...

Shayne,
No, GDAL will automatically use overviews if it finds them.
How are you determining that the overviews are not being used?
Glenn Waldron / Pelican Mapping
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Re: Loading GeoTiff with external overviews...

Glenn,

Performance.

When I use internal overviews, things run quickly. If I change to generating external overviews in the .ovr file, things page in very slowly when I load the associated tif file. It's as if I was just using the tif file alone and the external overviews in the .ovr file are being ignored.

Shayne