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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Related to my previous question today, what is the nature of “TIFFFetchDirectory:Sanity check on directory count failed” error?
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New"">:: gdal_translate -co compress=zstd -co predictor=yes -co level=17 -co bigtiff=yes -of cog -a_nodata 0 Finlayson9488_SP7_08Aug2017_150cm.rgb-nir.vrt
out\Finlayson9488_SP7_08Aug2017_150cm.rgb-nir.tif<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New"">Input file size is 41114, 22580<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New"">0...10...20ERROR 1: TIFFFetchDirectory:Sanity check on directory count failed, this is probably not a valid IFD offset<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New"">ERROR 1: TIFFReadDirectory:Failed to read directory at offset 16879620<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-left:36.0pt"><span style="font-size:10.0pt;font-family:"Courier New"">...30...40...50...60...70...80...90...100 - done.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">The translate run finished successfully and `gdalinfo -mm …` reports no errors on the output file structure. Visually the image appears intact. (Is scanning for minmax the best
way to test for a valid file? I’ve been using it that way for years but maybe it’s not best practice.)<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-top:4.0pt;line-height:115%;text-autospace:none;vertical-align:middle">
<b><span lang="EN-US" style="font-size:9.0pt;line-height:115%;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA">Matt Wilkie</span></b><span lang="EN-US" style="font-size:9.0pt;line-height:115%;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA">Geomatics Developer & Administrator<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA">Environment
<span style="color:#2E74B5">|</span> Technology, Innovation and Mapping<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA">T 867-667-8133
<span style="color:#2E74B5">|</span> </span><u><span style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA"><a href="http://yukon.ca/"><span lang="EN-US" style="color:windowtext">Yukon.ca</span></a><o:p></o:p></span></u></p>
<p class="MsoNormal"><i><span style="font-size:9.0pt;font-family:"Arial",sans-serif;mso-fareast-language:EN-CA">Hours: 08:30-16:30, Mon-Wed: Office, Thu: Remote, Fri: Away.<o:p></o:p></span></i></p>
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