hi, On Fri, Apr 15, 2011 at 6:01 AM, T.J.F. Commandeur <[email protected]>wrote: > > For scientific research I created another kind of Lasblock based on > spatial finalization by M. Isenburg (spfinalizer). > This program is able to process larger point clouds and has a low memory > footprint based on a quadtree structure. > > When the program is done it creates either separate las files for every > block or a las and kdx file. >
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? [1] http://www.cs.unc.edu/~isenburg/lastools/download/lastile_README.txt sorry ...cannot help on the Las2Oci questions cheers, martin @lastools > Now these are created I want to load them to an Oracle spatial SDO_PC > with Las2Oci. > > I am using libLAS from OS4geo on windows, during the usage of Las2Oci I > found some strange things. > > > > - 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). > > - 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? > > - 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. > > > > 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? > > > > Kind regards, > > Tom Commandeur > > _______________________________________________ > Liblas-devel mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/liblas-devel > >
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