[gdal-dev] baseline tiff and rpb file

[Ivan Lucena]

Hi Even,

Thank you very much for fixing that. Those options are a little trick. I understand.

So now what is the default to deal with RPC on a baseline tiff (-co profile=baseline) is:

a) Create the RPC on a .tif.aux.xml if there is a "RPB=NO" and when there is no RPB.

- That means that for baseline Tiff files the RPC goes to a RPC by default. 

b) Create the RPC on a .tif.aux.xml only if there is a "RPB=NO".

- That means that RPC is not the default. That behavior is more compatible with other "basic" formats. I guess.

Anyway, can we backport that to 1.11 and 1.10?

Thanks a lot.

Ivan

> From: even.rouault at spatialys.com
> To: gdal-dev at lists.osgeo.org
> Subject: Re: [gdal-dev] baseline tiff and rpb file
> Date: Fri, 10 Apr 2015 22:37:43 +0200
> CC: lucena_ivan at hotmail.com
> 
> Le vendredi 10 avril 2015 21:56:30, Ivan Lucena a écrit :
> > Hi there,
> > 
> > The documentation says:
> > 
> > "GDAL can read and write the RPCCoefficientTag as described in the
> > RPCs in GeoTIFF proposed extension. The tag is written only for
> > files created with the default profile GDALGeoTIFF. For other profiles, a
> > .RPB file is created. In GDAL data model, the RPC coefficients are stored
> > into the RPC metadata domain. For more details, see the RPC Georeferencing
> > RFC.
> > If .RPB or _RPC.TXT files are found, they will be used to read the RPCs,
> > even if the RPCCoefficientTag tag is set."
> > [http://www.gdal.org/frmt_gtiff.html]
> > 
> > But there is no way to export the RPC metadata into the .tif.aux.xml file,
> > like with other drivers.
> > 
> > I tried to turn off the create-option RPB but that doesn't work but It
> > creates the .RPB file anyway.
> > 
> > $ gdal_translate -of gtiff <source dataset> output.tif -co profile=beseline
> > -co RPB=no $ ls
> > output.tif
> > output.RPB
> > 
> > That woks fine with PNG/JPEG/BMP
> > 
> > $ gdal_translate -of png <source dataset> output.png
> > $ ls
> > output.png
> > output.png.aux.xml
> > 
> > Is that how it suppose to be or is it a bug? I mean, by entering -co RPB=no
> > GTIFF should create a  .aux.xml like other drivers do. Right?
> 
> Hi Ivan
> 
> Yes was a bug. I've just fixed it trunk (r28883). We have a non-trivial logic 
> to decide how/when/if writing RPC information...
> 
> Even
> 
> -- 
> Spatialys - Geospatial professional services
> http://www.spatialys.com
 		 	   		  
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