topic Re: Classify LAS Ground - ArcGIS Pro in ArcGIS Pro Questions https://community.esri.com/t5/arcgis-pro-questions/classify-las-ground-arcgis-pro/m-p/147338#M6373 <HTML><HEAD></HEAD><BODY><P>You might run into what I ran into <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span><BR />The help of the tool states as the first "pre-requisit":</P><P>Classify LAS Ground&nbsp; </P><DIV><DIV class=""><UL><LI><P>Only the last return of <STRONG>LAS points with class code values of 0, 1, or 2 will be considered for reclassification</STRONG> as ground. If your LAS files use different class code values to represent unclassified or ground measurements, consider using the <SPAN><A class="" href="https://community.esri.com/">Change LAS Class Codes</A></SPAN> tool to reassign them accordingly. The classification process will also ignore points that are assigned with either the overlap or noise classification flag.</P></LI></UL><P></P><P>So in fact if your data is REALLY unclassified - ArcGIS will not classify it. You (still) need additional tools.</P></DIV></DIV></BODY></HTML> Fri, 21 Jul 2017 12:44:15 GMT GünterDörffel 2017-07-21T12:44:15Z Classify LAS Ground - ArcGIS Pro https://community.esri.com/t5/arcgis-pro-questions/classify-las-ground-arcgis-pro/m-p/147337#M6372 <HTML><HEAD></HEAD><BODY><P>I used the Classify LAS Ground tool in ArcGIS Pro but still have no ground class in my layer properties.&nbsp; Just wondering why this is and how I can fix it? - as I am trying to create a DEM from unclassified LiDAR.</P></BODY></HTML> Thu, 20 Jul 2017 21:03:44 GMT https://community.esri.com/t5/arcgis-pro-questions/classify-las-ground-arcgis-pro/m-p/147337#M6372 NatashaStasiuk 2017-07-20T21:03:44Z Re: Classify LAS Ground - ArcGIS Pro https://community.esri.com/t5/arcgis-pro-questions/classify-las-ground-arcgis-pro/m-p/147338#M6373 <HTML><HEAD></HEAD><BODY><P>You might run into what I ran into <span class="lia-unicode-emoji" title=":slightly_smiling_face:">🙂</span><BR />The help of the tool states as the first "pre-requisit":</P><P>Classify LAS Ground&nbsp; </P><DIV><DIV class=""><UL><LI><P>Only the last return of <STRONG>LAS points with class code values of 0, 1, or 2 will be considered for reclassification</STRONG> as ground. If your LAS files use different class code values to represent unclassified or ground measurements, consider using the <SPAN><A class="" href="https://community.esri.com/">Change LAS Class Codes</A></SPAN> tool to reassign them accordingly. The classification process will also ignore points that are assigned with either the overlap or noise classification flag.</P></LI></UL><P></P><P>So in fact if your data is REALLY unclassified - ArcGIS will not classify it. You (still) need additional tools.</P></DIV></DIV></BODY></HTML> Fri, 21 Jul 2017 12:44:15 GMT https://community.esri.com/t5/arcgis-pro-questions/classify-las-ground-arcgis-pro/m-p/147338#M6373 GünterDörffel 2017-07-21T12:44:15Z