[gdal-dev] GetDescription method

[Paul Selormey]

Hello Frank,
Thanks for the support. I have tried some few image formats and got nothing,
so I thought it might not be returning anything for all the rasterbands.

Best regards,
Paul.

----- Original Message -----
From: "Frank Warmerdam" <warmerdam at p...>
To: <gdal-dev at yahoogroups.com>
Sent: Wednesday, August 28, 2002 9:46 PM
Subject: Re: [gdal-dev] GetDescription method


>
> Paul Selormey wrote:
> > The GetDescription() method of the dataset object currently
> > returns only the image file name. It this the objective or there
> > is more to it? (It is currently not documented)
>
> Paul,
>
> Despite the apparent meaning of the call it has been "usurped" to hold
> the filename when called on the GDALDataset object. Note that it isn't
> guaranteed that the filename returned by GetDescription() is exactly
> the same as what was passed to GDALOpen(), but it is supposed to be
> guaranteed to result in opening the same dataset if given to GDALOpen().
>
> > For the rasterband object, it is documented as returning the
> > description of the band, but currently returns nothing! What type
> > of information is really expected here?
>
> Most formats have no band descriptions. A few (or one?) formats, notably
> ENVI format, do support band descriptions and they are returned by
> GetDescription(). OpenEV will also show these band descriptions in some
> appropriate band dialogs.
>
> Where there is no band specific name, we deliberately return an empty
string
> so applications can easiliy recognise that there is no meaningful band
> description rather than "synthesising" one.
>
> Best regards,
>
> --
> ---------------------------------------+----------------------------------
----
> I set the clouds in motion - turn up | Frank Warmerdam,
warmerdam at p...
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush | Geospatial Programmer for Rent
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