<p dir="ltr">Away from my computer right now but I'm pretty sure they do. Also, I created these which for sure do.</p>
<p dir="ltr"><a href="https://github.com/PointCloudLibrary/data/terrain">https://github.com/PointCloudLibrary/data/terrain</a></p>
<br><div class="gmail_quote"><div dir="ltr">On Fri, Mar 24, 2017, 6:25 PM Michael Rosen <<a href="mailto:michael.rosen@gmail.com">michael.rosen@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr" class="gmail_msg">Indeed.  Thanks for this.<div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">> For the reference datasets, the data has once again been projected into UTM</div><div class="gmail_msg">zone 32U and converted from ASCII to LAZ. The data contain no return</div><div class="gmail_msg">information, but ground returns apply the LAS "Ground" classification (all</div><div class="gmail_msg">others are "Created, never classified").</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">My understanding was that the original reference data sets were classified manually.  Presumably, they contained only ground points.  Can you confirm that this original classification has been lost?</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">msr</div></div><div class="gmail_extra gmail_msg"><br class="gmail_msg"><div class="gmail_quote gmail_msg">On Fri, Mar 24, 2017 at 12:45 PM, Bradley Chambers <span dir="ltr" class="gmail_msg"><<a href="mailto:brad.chambers@gmail.com" class="gmail_msg" target="_blank">brad.chambers@gmail.com</a>></span> wrote:<br class="gmail_msg"><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr" class="gmail_msg">Michael,<div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">You may find this useful.</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg"><a href="https://github.com/PDAL/data/tree/master/isprs" class="gmail_msg" target="_blank">https://github.com/PDAL/data/tree/master/isprs</a><br class="gmail_msg"></div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">Released with permission of the authors.</div><div class="gmail_msg"><br class="gmail_msg"></div><div class="gmail_msg">Brad</div></div><br class="gmail_msg"><div class="gmail_quote gmail_msg"><div class="gmail_msg"><div class="m_-1450640125853531824h5 gmail_msg"><div dir="ltr" class="gmail_msg">On Fri, Mar 24, 2017 at 3:35 PM Michael Rosen <<a href="mailto:michael.rosen@gmail.com" class="gmail_msg" target="_blank">michael.rosen@gmail.com</a>> wrote:<br class="gmail_msg"></div></div></div><blockquote class="gmail_quote gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="gmail_msg"><div class="m_-1450640125853531824h5 gmail_msg"><div dir="ltr" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">Thanks guys.<div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">So, I'm looking at the Sithole-Vosselman "Filter Experiment" paper from 2004.  The data they provide is in text format and sadly, puts two points on a line (first and last return, though they don't give return number nor total number of returns).</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">data: <a href="http://www.itc.nl/isprswgIII-3/filtertest/" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg" target="_blank">http://www.itc.nl/isprswgIII-3/filtertest/</a></div></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909m_-2011970368728717950gmail-Apple-interchange-newline m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[X1 - First Return] - x coordinate (Easting)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[Y1 - First Return] - y coordinate (Northing)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[Z1 - First Return] - z coordinate (Height)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[I1 - First Return] - Intensity of returned pulse</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[X2 - Last  Return] - x coordinate (Easting)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[Y2 - Last  Return] - y coordinate (Northing)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[Z2 - Last  Return] - z coordinate (Height)</div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">[I2 - Last  Return] - Intensity of returned pulse</div></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div><div class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">To move forward I can, of course, preprocess the file so that these read in as two separate, unrelated, points.  However, a robustness test for PDAL would be if I could make a pipeline that would read it in as presented.  Could someone comment on how feasible that is.</div></div></div><div class="gmail_extra m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><div class="gmail_quote m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">On Thu, Mar 23, 2017 at 7:15 PM, Howard Butler <span dir="ltr" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><<a href="mailto:howard@hobu.co" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg" target="_blank">howard@hobu.co</a>></span> wrote:<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><blockquote class="gmail_quote m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
> On Mar 23, 2017, at 7:23 PM, Michael Rosen <<a href="mailto:michael.rosen@gmail.com" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg" target="_blank">michael.rosen@gmail.com</a>> wrote:<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
> Suppose I wanted to pass a text file into PDAL:<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
</span><span class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">> No header line, just a list of known fields.<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
</span>You need to add a header line at the moment. It would be straightforward to make a patch to add a header override option to the TextWriter.cpp code, but that hasn't been done so far.<br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
<span class="m_-1450640125853531824m_4377192354438044909m_-2011970368728717950HOEnZb m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><font color="#888888" class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg">
Howard</font></span></blockquote></div><br class="m_-1450640125853531824m_4377192354438044909gmail_msg gmail_msg"></div></div></div><span class="gmail_msg">
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