[gdal-dev] Polynomial warping ?

[Nicolas MERLET]

> -----Original Message-----
> From: gdal-dev-bounces at lists.osgeo.org 
> [mailto:gdal-dev-bounces at lists.osgeo.org] On Behalf Of Nicolas MERLET
> Sent: Thursday, March 06, 2008 1:32 PM
> To: gdal-dev at lists.osgeo.org
> Subject: [gdal-dev] Polynomial warping ?
> Importance: High
> 
> 
> Hi all,
> 
> I'm trying to transform an image using gdal_translate to add GCPs and
> gdalwarp to apply GCPs.
> 
> I'm using a jpeg grid as a demonstration. With ArcGIS, in 
> order 2, I get
> this result :
> http://dev.merletn.org/gis/arcgis.jpg
> 
> With the same GCPs, gdalwarp produces this result :
> http://dev.merletn.org/gis/gdalwarp.jpg
> 
> Here my GPS :
> http://dev.merletn.org/gis/grid-gcp.txt
> 
> For further information, you can see my batch file :
> http://dev.merletn.org/gis/batch.txt
> 
> I can't understand why GDAL does not use an order 2 polynomial
> transformation. Why does results are different from each others ?
> 
> Thank you very much for helping...
> 


No idea ?