[Gdal-dev] projected bounding box

[Jonathan Coles]

On Mon, 2003-07-14 at 20:29, Frank Warmerdam wrote:
> Jonathan,
> 
> As Ed mentions this is hard to do completely correctly.   The
> GDALSuggestedWarpOutput() is where I have it implemented for the image
> warper applications.  This code basically samples 20 points along each edge
> to transform and compute a bounding box.  This generally gives good results,
> but objects it can be off a bit or even alot in degenerate situations.
> 
> You might want to glance at gdal/alg/gdaltransformer.cpp::GDALSuggsestedWarpOutput().
> 

Thanks, I'm looking into playing around with different amounts of
sampling in my own code. Seems to be working alright for my test cases.
I'll have to watch out for extreme situations.

--jonathan

-- 
======================================================================
 Jonathan Coles                                jonathan at intevation.de
 Intevation GmbH                             http://www.intevation.de
======================================================================

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