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<p class="MsoNormal">Moving along here, and have encountered a new question…<o:p></o:p></p>
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<p class="MsoNormal">I’m getting some promising results from filters.cluster but would certainly like to be able to apply this filter ( and others ) multiple times with different settings while using writers.las after each filter so that I can review the progress
of the overall pipeline processing after each step completes.<o:p></o:p></p>
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<p class="MsoNormal">Is there a way to get my pipeline to write a LAS after each of the steps/filters? I’d like to save interim results for review, but cannot find a good example in the docs or in the list archive.<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> Howard Butler <howard@hobu.co> <br>
<b>Sent:</b> Wednesday, June 12, 2019 9:41 AM<br>
<b>To:</b> Karl North <karln@surdex.com><br>
<b>Cc:</b> Bradley Chambers <brad.chambers@gmail.com>; pdal@lists.osgeo.org<br>
<b>Subject:</b> Re: [pdal] tweaking parameters in filters.smrf<o:p></o:p></p>
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<p class="MsoNormal">On Jun 12, 2019, at 9:36 AM, Karl North <<a href="mailto:karln@surdex.com">karln@surdex.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Brad:<o:p></o:p></p>
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<p class="MsoNormal">Thanks for the suggestions.<o:p></o:p></p>
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<p class="MsoNormal">I’ve done some reading and begun playing around with the cluster filter. One problem is that I’m new enough to PDAL that I cannot find a way to add/define a dimension and store the cluster ID into either LAS or LAZ format on output. I
think it should be possible to just hijack an existing field in the point data records for current testing purposes. Does this sound possible? I’m floundering a bit trying to find an example of something similar. Can you point me in the right direction?<o:p></o:p></p>
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<p class="MsoNormal">Use the filters.ferry to copy ClusterID => PointSourceId downstream of your filters.cluster invocation.<o:p></o:p></p>
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<p class="MsoNormal"><a href="https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fpdal.io%2Fstages%2Ffilters.ferry.html&data=02%7C01%7C%7C5dc2119c10ca44f84e9008d6ef43fd22%7Cbf4323beeac04c8eb466c7924493cbee%7C0%7C0%7C636959472628150563&sdata=hKaN0thXKKf7fE%2F5nqkAZcSq8YMCR26WM7xkkz5IINI%3D&reserved=0">https://pdal.io/stages/filters.ferry.html</a><o:p></o:p></p>
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<p class="MsoNormal">I can get a BPF output, but currently have no way to review the result. I’m now downloading 64-bit QT Reader, after finding a thread by HoBu saying that this viewer would work for a quick review.<o:p></o:p></p>
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<p class="MsoNormal">I don't know if that is still viable.<o:p></o:p></p>
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<p class="MsoNormal">You can also write to LAS with extra bytes<o:p></o:p></p>
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<p class="MsoNormal">--writers.las.extra_dims=ClusterID<o:p></o:p></p>
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<p class="MsoNormal">but you'll need something that can view extra LAS dimensions. <o:p></o:p></p>
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<p class="MsoNormal">Howard<o:p></o:p></p>
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