hi,<br><br>
<div class="gmail_quote">On Fri, Apr 15, 2011 at 6:01 AM, T.J.F. Commandeur <span dir="ltr"><<a href="mailto:daboytom101@hotmail.com">daboytom101@hotmail.com</a>></span> wrote:
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<p class="MsoNormal"><span lang="EN-US">For scientific research I created another kind of Lasblock based on spatial finalization by M. Isenburg (spfinalizer).<br>This program is able to process larger point clouds and has a low memory footprint based on a quadtree structure.</span></p>
<p class="MsoNormal"><span lang="EN-US">When the program is done it creates either separate las files for every block or a las and kdx file.</span></p></div></div></blockquote>
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<div>interesting. do you mind sharing your code? i similarly re-used my spfinalizer code to tile large amounts of LAS points into separate uniform square LAS tiles with lastile [1]. i know that lasblock strives for balanced point counts and spatially compact blocks. what was your design goal? does your code - following the spfinalize strategy - merge the quad-tree cells of an initially overly detailed quad-tree bottom-up to reach a target minimum number of points per cell? </div>
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<div>[1] <a href="http://www.cs.unc.edu/~isenburg/lastools/download/lastile_README.txt">http://www.cs.unc.edu/~isenburg/lastools/download/lastile_README.txt</a></div>
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<div>sorry ...cannot help on the Las2Oci questions </div>
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<div>cheers,</div>
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<div>martin @lastools</div>
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<p class="MsoNormal"><span lang="EN-US">Now these are created I want to load them to an Oracle spatial SDO_PC with Las2Oci.</span></p>
<p class="MsoNormal"><span lang="EN-US">I am using libLAS from OS4geo on windows, during the usage of Las2Oci I found some strange things.</span></p>
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<p><span lang="EN-US"><span>-<span style="FONT: 7pt 'Times New Roman'"> </span></span></span><span lang="EN-US">When writing las to a database using a kdx file Las2Oci tends to duplicate the last block written to the database (kdx created by Lasblock).</span></p>
<p><span lang="EN-US"><span>-<span style="FONT: 7pt 'Times New Roman'"> </span></span></span><span lang="EN-US">Las2Oci loads the complete kdx file into memory which seems quite insufficient for memory usage. Can’t the kdx be read line by line (block by block) instead of completely at once?</span></p>
<p><span lang="EN-US"><span>-<span style="FONT: 7pt 'Times New Roman'"> </span></span></span><span lang="EN-US">When executing Las2Oci without a kdx file but with multiple las files it creates a new point cloud for every file. There is no option to add new blocks to an existing point cloud instead when using multiple las files.</span></p>
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<p class="MsoNormal"><span lang="EN-US">Is there a solution to these problems? Do I need to change my workflow for using Las2Oci to indeed add las files to an existing point cloud in the database?</span></p>
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<p class="MsoNormal"><span lang="EN-US">Kind regards,</span></p>
<p class="MsoNormal"><span lang="EN-US">Tom Commandeur</span></p></div></div><br>_______________________________________________<br>Liblas-devel mailing list<br><a href="mailto:Liblas-devel@lists.osgeo.org">Liblas-devel@lists.osgeo.org</a><br>
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