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I found the solution by replacing the function imagecopymerge_alpha given in http://trac.osgeo.org/openlayers/wiki/TileStitchingPrinting by the following function: function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct) { // creating a cut resource $cut = imagecreatetruecolor($src_w, $src_h); // copying ...


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JPEG2000 Pros: Better compression than JPEG Supports both lossy and lossless compression, JPEG is lossy only Supports any number of bands, JPEG only supports 3 bands Supports more datatypes (including floating point), JPEG only supports 8 bit (byte) data Internal precomputed multiresolution representation (aka pyramids) JPEG2000 Cons: Limited ...



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