[gdal-dev] Geolocation arrays - location interpretation

[Michele]

 Can someone unsubscribe me from this please?
    On Thursday, September 28, 2017 at 03:26:01 PM EDT, Even Rouault <even.rouault at spatialys.com> wrote:  
 
 
On jeudi 28 septembre 2017 17:26:52 CEST Agram, Piyush S (334D) wrote:

> Hi Even,

> I think I have figured out how the GeoLocTransformer works. Dumped out

> the backmap and might have some changes.

 

> 

> 1) Rounding up to the nearest integer is definitely the issue here.

> 

> 2) I’m going to try this first – maybe a weighted approach will be

> better. For now, if a pixel falls in the middle of square – I’m going to

> add it to all of the 4 vertices. Then average all the data that went into a

> pixel of the backmap.

 

Perhaps bilinear resampling so that the weights are proportionnal ?

 

 

> 3) For the regular grid tests, if this shows improvement (hopefully) –

> I can share the implementation and we can possibly discuss about adding a

> weighting scheme. I don’t want to increase the runtime too much by adding

> complexity.

 

I think (sub-pixel) accuracy is more important than speed. Speed improvements can be investigated later if needed.

 

-- 

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