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<p class="MsoNormal">Hi pdal’ers <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">These are my attempts to filter out (1) Unclassified Points flagged as withheld in LAS filers for further analyses.<o:p></o:p></p>
<p class="MsoNormal">Any chance you guys can point to where I have gone wrong?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">pipelines I have tried using pdal 2.3.0: to filter out (1) unclassified points flagged as withheld;<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">1.<span style="font-size:9.0pt;font-family:Consolas;color:#C9D1D9;border:none windowtext 1.0pt;padding:0cm;mso-fareast-language:EN-NZ"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.5pt;font-family:"Segoe UI",sans-serif;color:#C9D1D9;mso-fareast-language:EN-NZ"><o:p> </o:p></span></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> "pipeline" : [<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type" : "readers.las",<o:p></o:p></p>
<p class="MsoNormal"> "filename" : "input.las"<o:p></o:p></p>
<p class="MsoNormal"> },<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type":"filters.range",<o:p></o:p></p>
<p class="MsoNormal"> "limits":"Classification![129:129]"<o:p></o:p></p>
<p class="MsoNormal"> }, <o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type" : "writers.las",<o:p></o:p></p>
<p class="MsoNormal"> "a_srs" : "EPSG:2193+7839",<o:p></o:p></p>
<p class="MsoNormal"> "filesource_id" : "0",<o:p></o:p></p>
<p class="MsoNormal"> "filename" : "output.las"<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> ]<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2.<o:p></o:p></p>
<p class="MsoNormal">{<o:p></o:p></p>
<p class="MsoNormal"> "pipeline" : [<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type" : "readers.las",<o:p></o:p></p>
<p class="MsoNormal"> "filename" : "input.las"<o:p></o:p></p>
<p class="MsoNormal"> },<o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type":"filters.range",<o:p></o:p></p>
<p class="MsoNormal"> "limits":"Classification![129:129]",<o:p></o:p></p>
<p class="MsoNormal"> "where":"Classification!=129"<o:p></o:p></p>
<p class="MsoNormal"> }, <o:p></o:p></p>
<p class="MsoNormal"> {<o:p></o:p></p>
<p class="MsoNormal"> "type" : "writers.las",<o:p></o:p></p>
<p class="MsoNormal"> "a_srs" : "EPSG:2193+7839",<o:p></o:p></p>
<p class="MsoNormal"> "filesource_id" : "0",<o:p></o:p></p>
<p class="MsoNormal"> "filename" : "output.las"<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"> ]<o:p></o:p></p>
<p class="MsoNormal"> }<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">3.<o:p></o:p></p>
<p class="MsoNormal">pdal info --stats C:\Temp\scan_angle\test_file\CL2_BW24_2020_1000_4526.las --filters.range.limits=Classification![129:129] --filters.stats.dimensions=Classification --filters.stats.count=Classification<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">All my outputs have these points still intact in their files and the pdal info doesn't appear to support this filter.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kindest regards <o:p></o:p></p>
<p class="MsoNormal">Rose Phillips<o:p></o:p></p>
<p class="MsoNormal">Elevation Data – Land Information New Zealand <o:p></o:p></p>
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