<div class="gmail_quote">Hi All,<br><br>I am new here. Recently I was trying to compress all the tif (some of them have been georeferenced in Arcgis) to jp2. This is the first time that I touch the jp2- amazing! It has the similar quality but smaller size ( 1G tiff= 45M jp2). However, there are some tif images which i have georeferenced before (but not rectified). I used the gdalinfo command but- it seems that gdalinfo (see below) cannot retrieve the external georeferencing information (.aux.xml files). So, when I gdal_translate these images to jp2- they do not have any valid georeferecing information either. Any help will be appreciated.<br>
<br><i>C:\bin\release-1600-gdal-1-8-0-mapserver-5-6-6>gdalinfo w:\3512\3512_2a_181.tif<br>Driver: GTiff/GeoTIFF<br>Files: w:\3512\3512_2a_181.tif<br> w:\3512\3512_2a_181.aux<br> w:\3512\3512_2A_181.rrd<br>
w:\3512\3512_2a_181.tif.aux.xml<br>
Size is 18808, 18808<br>Coordinate System is `'<br>Metadata:<br> TIFFTAG_XRESOLUTION=798.91986<br> TIFFTAG_YRESOLUTION=798.79858<br> TIFFTAG_MINSAMPLEVALUE=0<br> TIFFTAG_MAXSAMPLEVALUE=255<br> TIFFTAG_RESOLUTIONUNIT=3 (pixels/cm)<br>
Image Structure Metadata:<br> INTERLEAVE=PIXEL<br>Corner Coordinates:<br>Upper Left ( 0.0, 0.0)<br>Lower Left ( 0.0,18808.0)<br>Upper Right (18808.0, 0.0)<br>Lower Right (18808.0,18808.0)<br>Center ( 9404.0, 9404.0)<br>
Band 1 Block=18808x1 Type=Byte, ColorInterp=Red<br> Overviews: 4702x4702, 2351x2351, 1176x1176, 588x588, 294x294, 147x147, 74x74,<br>37x37<br>Band 2 Block=18808x1 Type=Byte, ColorInterp=Green<br> Overviews: 4702x4702, 2351x2351, 1176x1176, 588x588, 294x294, 147x147, 74x74,<br>
37x37<br>Band 3 Block=18808x1 Type=Byte, ColorInterp=Blue<br> Overviews: 4702x4702, 2351x2351, 1176x1176, 588x588, 294x294, 147x147, 74x74,<br>37x37</i><br><br>The georeferencing infomation is valid in Arcgis (although I did not rectify it or make it as GeoTiff.)<br>
<img title="1zq795y.jpg" alt="1zq795y.jpg" src="http://i53.tinypic.com/1zq795y.jpg"><br>Cheers,<br><font color="#888888">Nuo<br></font></div><br>