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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>All,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I just finished writing a simple test app that uses GDAL
1.3.1 . My OS is WinXP. </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I use this method:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'>CPLErr GDALRasterBand::RasterIO ( </span><a
href="http://www.gdal.org/gdal_8h.html#4844f11ca9da952f36f3c979b6b0d320"><span
lang=EN-US>GDALRWFlag</span></a></font><span lang=EN-US> <em><i><font
face="Times New Roman">eRWFlag</font></i></em>, int <em><i><font
face="Times New Roman">nXOff</font></i></em>, int <em><i><font
face="Times New Roman">nYOff</font></i></em>, int <em><i><font
face="Times New Roman">nXSize</font></i></em>, int <em><i><font
face="Times New Roman">nYSize</font></i></em>, void * <em><i><font
face="Times New Roman">pData</font></i></em>, int <em><i><font
face="Times New Roman">nBufXSize</font></i></em>, int <em><i><font
face="Times New Roman">nBufYSize</font></i></em>, </span><a
href="http://www.gdal.org/gdal_8h.html#0287768ebb5ec0ce09259acdb570eb8e"><span
lang=EN-US>GDALDataType</span></a><span lang=EN-US> <em><i><font
face="Times New Roman">eBufType</font></i></em>, int <em><i><font
face="Times New Roman">nPixelSpace</font></i></em>, int <em><i><font
face="Times New Roman">nLineSpace</font></i></em> ) </span></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>to render and resample RGB data. It mostly works, but
it’s quite unusable when I use MrSID and ECW</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>1. MrSID problem</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>It looks like RasterIO method doesn’t use MrSID
multiresolution support. It takes 80 seconds to get data from 3.5MB SID file. I
am trying to get full extent with output dimensions set to approx. 500x500
pixels.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>2. ECW problem. </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>I have 2.5GB ECW. It shows full extent very fast, but
when I zoom in a little, I get back blank image! If I continue to zoom in,
eventually I get the data from lowest pyramid level. </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Please help.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span lang=EN-US style='font-size:
10.0pt;font-family:Arial'>Sergey Malgin</span></font></p>
<p class=MsoNormal><font size=3 face=Arial><span lang=EN-US style='font-size:
12.0pt;font-family:Arial'>ESRI, Inc</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'> </span></font></p>
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