Francois,<br><br>This is what gdal_translate utility does with the '-srcwin' option. You can see it's code at <a href="http://trac.osgeo.org/gdal/browser/trunk/gdal/apps/gdal_translate.cpp">http://trac.osgeo.org/gdal/browser/trunk/gdal/apps/gdal_translate.cpp</a><br>
You need to translate the projection window according to the block within the image. For that you have to modify the transformation matrix from GDALGetGeoTransform() and and set a new one with GDALSetGeoTransform().<br><br>
<div class="gmail_quote">On Thu, Jul 8, 2010 at 3:47 PM, Francois Maass <span dir="ltr"><<a href="mailto:fieliesm@gmail.com">fieliesm@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>Good day list!<br><br>I have an image (Tiff or Pix) read into a GDALDataset as well as the following:<br>1. The (x,y) coordinates/offset of the top-left corner of a block within the image,</div>
<div>2. The width and length of the block<br><br>I want to create a GDALDataset that only contains this specific block of the given image. <br>Simply put, I want to extract a little block or chip from an existing GDALDataset, and put it into its own GDALDataset.<br>
<br>Can this be done, and how?</div>
<div>Thank you for your time and efforts!</div>
<div> </div>
<div>Warm Regards,<br><font color="#888888">Francois Maass</font></div>
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