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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I fed just points which where classified as “ground”, but which I know do contain vegetation…<o:p></o:p></span></p>
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<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""> Newcomb, Doug [mailto:doug_newcomb@fws.gov]
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<b>Sent:</b> 6. desember 2013 15:26<br>
<b>To:</b> Blumentrath, Stefan<br>
<b>Cc:</b> grass-dev@lists.osgeo.org<br>
<b>Subject:</b> Re: [GRASS-dev] G7: v.loutlier Decomposition failed<o:p></o:p></span></p>
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<p class="MsoNormal">Are those bare earth points only, or are you feeding it the entire point cloud?<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Dec 6, 2013 at 7:17 AM, Blumentrath, Stefan <<a href="mailto:Stefan.Blumentrath@nina.no" target="_blank">Stefan.Blumentrath@nina.no</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Hi</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">Maybe it is not of importance, because no one else would use such extreme settings, but in case someone considers it as a bug:</span><o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">I was testing a bit with v.outlier in GRASS 7 on dense LiDAR data (~4 points per m2).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">When I use a very low Tykhonov regularization parameter (lambda_i) of 0.0000000000000000001 and rather short spline steps (1.5) at 0.5m resolution I get an error-message:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US">“Decomposition failed at row 16499 and col 0”</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="color:#888888">Stefan</span><span style="color:#888888"><o:p></o:p></span></p>
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_______________________________________________<br>
grass-dev mailing list<br>
<a href="mailto:grass-dev@lists.osgeo.org">grass-dev@lists.osgeo.org</a><br>
<a href="http://lists.osgeo.org/mailman/listinfo/grass-dev" target="_blank">http://lists.osgeo.org/mailman/listinfo/grass-dev</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Doug Newcomb<o:p></o:p></p>
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<p class="MsoNormal">USFWS<o:p></o:p></p>
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<p class="MsoNormal">Raleigh, NC<o:p></o:p></p>
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<p class="MsoNormal">919-856-4520 ext. 14 <a href="mailto:doug_newcomb@fws.gov" target="_blank">
doug_newcomb@fws.gov</a><o:p></o:p></p>
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<p class="MsoNormal">---------------------------------------------------------------------------------------------------------<o:p></o:p></p>
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<p class="MsoNormal">The opinions I express are my own and are not representative of the official policy of the U.S.Fish and Wildlife Service or Dept. of the Interior. Life is too short for undocumented, proprietary data formats.<o:p></o:p></p>
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