[Gdal-dev] band concept of GDAL data model

[wang liyan]

Frank Warmerdam,
     Thank you very much for your help! Now I have solved the problem.

                                       jeff

>From: Frank Warmerdam <warmerdam at pobox.com>
>Reply-To: gdal-dev at remotesensing.org
>To: gdal-dev at remotesensing.org
>Subject: Re: [Gdal-dev] band concept of GDAL data model
>Date: Sun, 28 Dec 2003 11:46:50 -0500
>
>wang liyan wrote:
> >
> > Hi,
> >
> >   What I want is to change a one-band image into a image with 4 bands
> > image.
> >   I have already read the image data by using RasterIO method,the type
> > of origion
> > image is GDT_Byte.Then how to create an 4 bands image which type is
> > GDT_Float32?
> >
> > I have read the GDAL data model for several times.But i don't quiet
> > understand it.
> >
> > Can any experts help me?
> >
> >    Thanks in advanced!
> >                                       jeff
>
>Jeff,
>
>The details will vary but basically you would use the Create()
>method on the GDALDriver class to create a new file with the
>desired dimensions, number of bands and band data type, and then
>use the RasterIO() method to read from your source file and then
>write to your destination file.  You will need to review the API
>documentation to do some of this.  The tutorial should cover much
>of what you need:
>
>   http://www.remotesensing.org/gdal/gdal_tutorial.html
>
>Best regards,
>
>--
>---------------------------------------+--------------------------------------

>I set the clouds in motion - turn up   | Frank Warmerdam, 
warmerdam at pobox.com
>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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