Hi,

Do geotiffs with -co tiled=YES -co compression=JPEG -co photometric=YCBCR and 
then gdaladdo with

--config COMPRESS_OVERVIEW JPEG --config PHOTOMETRIC_OVERVIEW YCBCR

I prefer external overviews nowadays.

-Jukka Rahkonen-


________________________________
 Mark Volz wrote:

> Hello,

> I would like to increase the speed on my air photos.  I have created a 
> uncompressed tiff, which Is fast however, the file size is much too large for 
> my project.  On the other hand the file size of MrSID is appropriate, but it 
> is slow even when using PROCESSING "OVERSAMPLE_RATIO=1.0."

> Is there a happy medium between the two file formats?

> Thanks


> Mark Volz
> GIS Specialist



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