[gdal-dev] Spherical Mercator projects and overviews?

[Frank Warmerdam]

Stephen Woodbridge wrote:
> Hi all,
> 
> I have a question regarding imagery in spherical mercator projection in 
> geotiff images. Do overviews work correctly?
> 
> For example, I use EPSG:4326 and build lots of overviews and I can zoom 
> in and out and pan without a problem. Can I do the same thing with 
> EPSG:900913 (spherical mercator projection).
> 
> I'm working with LandSat imagery over large area and scale ranges.

Steve,

I can't see any reason that overviews would not work on spherical
mercator when they work on images in other coordinate systems.  The
overview handling is independent of the georeferencing.

Best regards,
-- 
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