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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Indeed, all the filters I use in this particular pipeline are incompatible with the --stream option; they must load the entire dataset in memory:
outlier, range, normal, colorinterp.<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">Sébastien<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"">De :</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Albert Godfrind [mailto:albert.godfrind@oracle.com]
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<b>Envoyé :</b> vendredi 16 juin 2017 14:20<br>
<b>À :</b> GUIMMARA, Sébastien (External)<br>
<b>Cc :</b> pdal<br>
<b>Objet :</b> Re: [pdal] [Filters] Decimation built into a reader<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ah OK. 6GB of LAZ would probably be equivalent to 75GB of LAS files. Still not a lot of data. Definitely something I would expect to process on a regular laptop without effort ...<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ve witnessed RAM usage of more than 38 GB (intensive swap usage) on my own dev box (8 cores, 16 GB RAM, SSD), and the process could not finish
because it ran out of memory. So extrapolating to the target machine, this is unbearable.</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">Looks like one of the processes in the pipeline requires loading the entire (uncompressed) dataset in memory ? Someone in the PDAL dev team may comment here. If so, then that is a bit of a worry regarding scalability ...<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Albert<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-family:"Helvetica","sans-serif";color:black">--<br>
<a href="http://www.oracle.com"><span style="border:solid windowtext 1.0pt;padding:0cm;text-decoration:none"><img border="0" id="_x0000_i1025" src="cid:~WRD000.jpg" alt="Image supprimée par l'expéditeur. ORACLE"></span></a><br>
</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666">Albert Godfrind | Geospatial and Graph technologies | Tel: +33 4 93 00 80 67</span><span class="apple-converted-space"><span style="font-family:"Helvetica","sans-serif";color:black"> </span></span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666">|
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</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:red">Oracle</span><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666"> </span></span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666">Server
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Sophia Antipolis | France</span><span style="font-family:"Helvetica","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666"><a href="http://www.apress.com/9781590598993">Everything you ever wanted to know about Oracle Spatial</a></span><span style="font-family:"Helvetica","sans-serif";color:black"><o:p></o:p></span></p>
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<p class="MsoNormal">On 16-Jun-2017, at 12:18, GUIMMARA, Sébastien (External) <<a href="mailto:sebastien.guimmara.external@airbus.com">sebastien.guimmara.external@airbus.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Albert,</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">My goal is to be able to convert datasets on average desktop computers (4 core/8 GB RAM, spinning drives) without blowing memory requirements,
so that they can be quickly displayed in a virtual globe.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">The dataset is indeed 6 GB of LAZ files. The goal is to process it with PDAL (outlier, range, colorinterp/colorize, normal), then tile it to 3D
Tiles with Entwine.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I’ve witnessed RAM usage of more than 38 GB (intensive swap usage) on my own dev box (8 cores, 16 GB RAM, SSD), and the process could not finish
because it ran out of memory. So extrapolating to the target machine, this is unbearable.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">For now, my workflow to circumvent this would be to decimate each LAZ file in a separate pipeline prior to merge them and go on with the filters.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sébastien</span><o:p></o:p></p>
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<em><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#999999">Airbus DS Geo SA (325 089 589 RCS Toulouse) - Siege social: 5, rue des Satellites, 31400 Toulouse, France.</span></em><span style="font-size:9.0pt;font-family:"Helvetica","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica","sans-serif""> <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"">De :</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Albert
Godfrind [<a href="mailto:albert.godfrind@oracle.com"><span style="color:purple">mailto:albert.godfrind@oracle.com</span></a>]<span class="apple-converted-space"> </span><br>
<b>Envoyé :</b><span class="apple-converted-space"> </span>vendredi 16 juin 2017 11:40<br>
<b>À :</b><span class="apple-converted-space"> </span>GUIMMARA, Sébastien (External)<br>
<b>Cc :</b><span class="apple-converted-space"> </span>pdal<br>
<b>Objet :</b><span class="apple-converted-space"> </span>Re: [pdal] [Filters] Decimation built into a reader</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">Sébastien,<o:p></o:p></p>
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<p class="MsoNormal">I would not exactly qualify 6GB of LAS data as massive. Do you really mean 6GB ? Or do you mean 6TB ?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal">When you say you want to import the data, what are you importing into ? A database ? Another file structure ?<o:p></o:p></p>
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<p class="MsoNormal"> <o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">my desktop computer simply couldn’t handle the memory footprint of such a massive dataset.</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">What kind of desktop are you using that cannot cope with such a small file ? (unless of course you really mean 6TB).<o:p></o:p></p>
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<p class="MsoNormal">Albert<o:p></o:p></p>
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</span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666">Albert Godfrind | Geospatial and Graph technologies | Tel: +33 4 93 00 80 67</span><span class="apple-converted-space"><span style="font-family:"Helvetica","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666">|
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif";color:#666666"><a href="https://urldefense.proofpoint.com/v2/url?u=http-3A__www.apress.com_9781590598993&d=DwMGaQ&c=RoP1YumCXCgaWHvlZYR8PQcxBKCX5YTpkKY057SbK10&r=1qY34HIjMdHQKENpnLMMP4yLfmc3rd-OMDuH2zkUKUk&m=ouipdry-XnkgLWUH6l0Sxec3Oe19MR_IJdXFdvNJXnQ&s=F9wB40TvYdZ5RS04es9Qg8B2HoM8ChmIb2AqQsXZ-Oc&e="><span style="color:purple">Everything
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<p class="MsoNormal">On 15-Jun-2017, at 17:18, GUIMMARA, Sébastien (External) <<a href="mailto:sebastien.guimmara.external@airbus.com"><span style="color:purple">sebastien.guimmara.external@airbus.com</span></a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hello everyone,</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I’m trying to import a massive point cloud as a collection of LAS files (6GB, 27 files), and I realized that my desktop computer simply couldn’t handle the memory
footprint of such a massive dataset.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">So I’m putting a decimation filter to reduce the size, but I’m having a doubt: is the filter useful here or is the dataset entirely loaded into memory before
even applying the filter ? In other words, does the downstream filters controls how the upstream reader loads data into memory ?</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">If not, would it be a nice feature to include to some (all ?) readers ? Like a builtin decimation/sampling filter.</span><o:p></o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Sébastien</span><o:p></o:p></p>
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