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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks, Andrew. I’m subscribed to the ticket you just created and will make sure to test as well when you have a fix.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I agree that forked pipelines are a complicated affair, but it can also be a very powerful tool if you know what you are doing.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I don’t expect PDAL to hold my hand in that regard!<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">/Kristian<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Fra:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Andrew Bell [mailto:andrew.bell.ia@gmail.com]
<br>
<b>Sendt:</b> 14. november 2016 15:40<br>
<b>Til:</b> Kristian Evers<br>
<b>Cc:</b> pdal<br>
<b>Emne:</b> Re: [pdal] Possible bug related to forked pipelines<o:p></o:p></span></p>
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<p class="MsoNormal">The particular report is a bug in parsing the pipeline. However, handling a pipeline that forks is tricky. I think we take a hands-off approach, which means that unless you're careful, you may not get the behavior you expect. I'll fix
the bug, test and report back.<o:p></o:p></p>
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<p class="MsoNormal">On Mon, Nov 14, 2016 at 6:33 AM, Kristian Evers <<a href="mailto:kreve@sdfe.dk" target="_blank">kreve@sdfe.dk</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">Hi.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">I have a few use cases where it would be beneficial to create a forked pipeline, i.e. one that generates</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">several outputs from the same input-file, but I am having some trouble achieving that.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">If I understand the documentation correctly it should be possible by using the tags and inputs keywords</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas">in a pipeline. Something like this:</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:65.2pt">
<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">{</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "pipeline":[</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> {</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "type": "readers.las",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "filename": "input.las",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "tag": "A"</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> },</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> {</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "inputs": "A",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "type": "writers.gdal",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "resolution": 0.4,</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "radius": 0.7,</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "filename": "Z.tif",</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:65.2pt">
<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "dimension": "Z",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "output_type": "mean</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> },</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> {</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:65.2pt">
<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "inputs": "A",</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;margin-left:65.2pt">
<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "type": "writers.gdal",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "resolution": 0.4,</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "radius": 0.7,</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "filename": "intensity.tif",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "dimension": "Intensity",</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> "output_type": "mean"</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> ]</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">}</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">That is, use the new gdal writer (which is awesome, btw) to grid two or more dimensions of a las-file.</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">When I run this particular pipeline I get the following error:</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> </span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">“PDAL: writers.gdal: specified dimension 'Intensity' does not exist.”</span><o:p></o:p></p>
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<span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">which suggests that the last writer (intensity.tif) is trying to grid a dimension from the first writer</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">(Z.tif) instead of input.las. This is a bit confusing since I specifically instruct PDAL to read</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">from tag A defined in the first stage of the pipeline. Is this a bug or just me trying to do something</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">I was never meant to do?</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">I am working on a Windows 7 computer and PDAL was compiled with VS2015 from a fairly</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">new revision (2f57c0cf1703af51498f9dae71c9a70128c4c93a).</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black"> </span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">Regards,</span><o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:black">Kristian</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Andrew Bell<br>
<a href="mailto:andrew.bell.ia@gmail.com" target="_blank">andrew.bell.ia@gmail.com</a><o:p></o:p></p>
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