Hello,
I have a tiff file that contains a full size 16Kx16K image, compressed using
JPEG. The file also contains ten reduced size overviews. When this image is
opened in gvSIG, the overviews are not used; instead, the full size image is
red in memory. This reading operation takes a long time to complete.
I know that Java Advanced Imaging (JAI) can handle image pyramids and that
Geotools uses this capability. I also know that gdal can use image pyramids.
Quantum GIS uses gdal to display an overview of the image.
Is there an existing automatic or semi-automatic way to read an appropriately
sized overview instead, using gvSIG / jgdal?
If so, what is it?
If not, what development would be necessary? What are the relevent libraries /
classes? Is there any reading material that could help?
Kami Rousseau
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