<div dir="ltr">You're mixing syntax for the older "assignment" option with that of the newer "value" option.<div><br></div><div>Try this:</div><div><br></div><div><p class="MsoNormal"><span style="color:rgb(54,95,145)">[<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type":"readers.las",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "filename":"input.las"<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> },<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {</span><br></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type":"filters.assign",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "assignment":"IntnstySqRt = Intensity / 256" <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> },<u></u><u></u></span></p> ...</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Aug 17, 2021 at 6:09 AM Peter Lim <<a href="mailto:peter.lim@gpslands.com">peter.lim@gpslands.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div lang="EN-SG"><div class="gmail-m_1008237852334678820WordSection1"><p class="MsoNormal"><span style="color:rgb(31,73,125)">Hi,<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">I’m trying to generate a GeoTiff image from a LAS file using the sq. root of Intensity dimension and the pipeline as follows:<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">[<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type":"readers.las",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "filename":"input.las"<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> },<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type": "filters.ferry",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "dimensions":"Intensity=>IntnstySqRt"<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> }, <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type":"filters.assign",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "assignment":"IntnstySqRt[:] = IntnstySqRt / 256" <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> },<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> {<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "type":"writers.gdal",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "resolution": 0.05,<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "data_type":"uint8",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "output_type":"mean",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "dimension":"IntnstySqRt",<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "gdalopts":"COMPRESS=JPEG,PHOTOMETRIC=YCBCR,BLOCKXSIZE=4096,BLOCKYSIZE=4096,GDAL_CACHEMAX=8000,NUM_THREADS=ALL_CPUS,TILED=YES", <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "bounds":"([19370,20527],[39571,40865])", <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> "filename":"output.tif"<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"> } <u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">]<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">However, error occurred:<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">PDAL: filters.assign: Invalid value for argument 'assignment'.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">Is it the correct use of filters.ferry and filters. assign…<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">Please advise.<u></u><u></u></span></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">Thank you.<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">Best Regards,<u></u><u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(54,95,145)">Peter Lim<u></u><u></u></span></p><p class="MsoNormal"><i><span style="color:rgb(54,95,145)">GPS Lands (S) Pte Ltd</span></i><i><span style="color:rgb(54,95,145)"><u></u><u></u></span></i></p><p class="MsoNormal"><u></u> <u></u></p></div><div id="gmail-m_1008237852334678820DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br>
<table style="border-top:1px solid rgb(211,212,222)">
<tbody><tr>
<td style="width:55px;padding-top:13px"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" target="_blank"><img src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif" alt="" width="46" height="29" style="width: 46px; height: 29px;"></a></td>
<td style="width:470px;padding-top:12px;color:rgb(65,66,78);font-size:13px;font-family:Arial,Helvetica,sans-serif;line-height:18px">Virus-free. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient" style="color:rgb(68,83,234)" target="_blank">www.avast.com</a>
</td>
</tr>
</tbody></table><a href="#m_1008237852334678820_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"> </a></div></div>_______________________________________________<br>
pdal mailing list<br>
<a href="mailto:pdal@lists.osgeo.org" target="_blank">pdal@lists.osgeo.org</a><br>
<a href="https://lists.osgeo.org/mailman/listinfo/pdal" rel="noreferrer" target="_blank">https://lists.osgeo.org/mailman/listinfo/pdal</a><br>
</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature">Andrew Bell<br><a href="mailto:andrew.bell.ia@gmail.com" target="_blank">andrew.bell.ia@gmail.com</a></div>