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<P CLASS="c8d73bdf-d1f4-46bc-b539-71a91b890ed5"><div class=WordSection1><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi Uwe,<o:p></o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sorry to bother you again. I actually need your help about another GDALWARP problem I am having. I just thought it might be better to send you an email directly about this (a shortcut</span><span style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">) although I did just post a message regarding this problem on the GDAL DEV forum:</span> <span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><a href="http://osgeo-org.1803224.n2.nabble.com/gdalwarp-reprojection-problem-td6030749.html?by-user=t" target="_top" rel="nofollow" link="external">http://osgeo-org.1803224.n2.nabble.com/gdalwarp-reprojection-problem-td6030749.html</a>.<o:p></o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I am just wondering whether you have seen this kind of problem before. Do you have idea about what could be the cause for this problem?<o:p></o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks & Best Regards,<o:p></o:p></span></p><p class=MsoNormal><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Heng<o:p></o:p></span></p><p class=MsoNormal><b><span lang=EN-US style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang=EN-US style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Schmitz, Uwe [via OSGeo.org] [mailto:<a href="/user/SendEmail.jtp?type=node&node=6030762&i=0" target="_top" rel="nofollow">[hidden email]</a>] <br><b>Sent:</b> 24 January 2011 09:25<br><b>To:</b> Heng Feng<br><b>Subject:</b> AW: [gdal-dev] An issue about using GDALWARP todotheNTv2transformation<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Heng, <o:p></o:p></p><div><p class=MsoNormal><div class='shrinkable-quote'><br>> <br>> Hi Uwe, <br>> <br>> I have been trying to use gdal_merge.py to merge <br>> a few 8 bit colored .tif tiles together. Having <br>> tried all sorts of options for this command, I <br>> always ended up with a merged 8-bit grayscale picture. <br>> I did a search on the internet and found a couple of <br>> posts related to this, however it seemed to me that <br>> the gdal_merge.py just does not have the ability <br>> to preserve the color. Did I get the wrong idea about <br>> this? Do you have any suggestion to solve this problem? <br>> <o:p></o:p></p></div><p class=MsoNormal style="margin-bottom:12.0pt">you have to specify "-pct" to grab the color table </div>of the first merged tile for the result file. <br>And, very important, all input tiles need to have <br>the *same* color table, because merging is done <br>on pixel values (that means channels). <br><br>> Not sure if I should post a separate message for <br>> this gdal_merge.py issue. I just thought this would <br>> be the quickest way to get the help :) <br>> <br>Yes, IMO a seperate post would have been better and <br>addressing it to me wouldn't always help to get a fast <br>response ;-) <br><br>Regards <br>Uwe <br>_______________________________________________ <br>gdal-dev mailing list <br><a href="/user/SendEmail.jtp?type=node&node=5954610&i=0&by-user=t" target="_top" rel="nofollow" link="external">[hidden email]</a> <br><a href="http://lists.osgeo.org/mailman/listinfo/gdal-dev" target="_top" rel="nofollow" link="external">http://lists.osgeo.org/mailman/listinfo/gdal-dev</a><br><br><o:p></o:p></p><div align=center class=MsoNormal style="text-align:center"><hr align=center noshade size=1 style="color:#CCCCCC" width="100%"></div><div><div><p class=MsoNormal><b><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#444444">If you reply to this email, your message will be added to the discussion below:<o:p></o:p></span></b></p></div><p class=MsoNormal><span style="font-size:9.0pt;font-family:"Tahoma","sans-serif";color:#444444"><a href="http://osgeo-org.1803224.n2.nabble.com/An-issue-about-using-GDALWARP-to-do-the-NTv2-transformation-tp5838904p5954610.html?by-user=t" target="_top" rel="nofollow" link="external">http://osgeo-org.1803224.n2.nabble.com/An-issue-about-using-GDALWARP-to-do-the-NTv2-transformation-tp5838904p5954610.html</a> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style="font-size:8.5pt;font-family:"Tahoma","sans-serif";color:#666666">To unsubscribe from An issue about using GDALWARP to do the NTv2 transformation, <a href="http://osgeo-org.1803224.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=5838904&code=aGVuZy5mZW5nQGFpcmNvbWludGVybmF0aW9uYWwuY29tfDU4Mzg5MDR8MTI3MzEwMjEw&by-user=t" target="_top" rel="nofollow" link="external">click here</a>. <o:p></o:p></span></p></div></div></P>
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