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owenransen
(Stranger )
02/10/16 09:49 PM
LIDAR to DXF beta testing new Report this article as Inappropriate to us !!!Login to Reply

I wondered about doing a program which converted LIDAR files into DXF files  more than a year ago. The feedback was discouraging but useful, in particular:



  1. AutoCAD and DXF is no way to look at LIDAR data

  2. There are lots of free programs which already do that


A while ago I had another look at the problem and thought:



  1. Some people with non-GIS programs might want/need to look at LIDAR data anyway, a "light" version of the data.

  2. None of the free (or even payed for) programs did exactly what I wanted to do, and most were very complex to use.


So I decided to do one just to see what the reaction is, here it is:


    http://www.LidarToDxf.com


I presume that you are all hard-code GIS people and maybe this is of no interest to you, but all feedback is welcome, negative/positive...





ferrellsl
(Stranger )
04/10/16 06:44 PM
Re: LIDAR to DXF beta testing new [re: owenransen]Report this article as Inappropriate to us !!!Login to Reply

I've written an application that can process LIDAR files into 3D terrain models.  Output file formats include both AutoCAD DXF or ArcInfo ESRI grids. It's extremely fast and create a DXF from over 50 million points in less than 3 minutes.  You can learn more about it by clicking the link below.


http://lidarwidgets.ddns.net:9000


 


 





ferrellsl
(Stranger )
06/01/16 08:29 PM
Re: LIDAR to DXF beta testing [re: ferrellsl]Report this article as Inappropriate to us !!!Login to Reply

I've had several requests for an application that extracts the ground returns from a LAS/LAZ file so that the ground could be modeled separately without any vegetation or structures on it.  In response, I've written a new app called LAStoGround-XYZ that it will extract all the ground returns from a LAS/LAZ file and place them in an XYZ text file suitable for meshing or TIN'ing.  I'm also giving away for free another app called LAStoDXF-TIN.  It will create a TIN from a LAS/LAZ and generate a DXF as output.  You can get copies for OS X and Windows here: http://lidarwidgets.com/#!page-freestuff


For terrain meshing and batch conversion of LAS/LAZ files, see my full site at:  http://lidarwidgets.com





ferrellsl
(Stranger )
09/26/16 10:04 AM
Re: LIDAR to DXF beta testing new [re: ferrellsl]Report this article as Inappropriate to us !!!Login to Reply

I've just updated a few tools for working with LAS/LAZ files and added a couple new tools.  My LAS to DXF point cloud tool now converts a LAS point cloud to a DXF point cloud and preserves the classification of the laser returns.  I.e. LIDAR ground returns are classified as a 2 so all ground returns are placed on layer 2 during the conversion process.  Vegetation is classified as 3, 4, or 5 for Low, Medium or High Vegetation and are placed on layers, 3, 4, and 5 respectively.  The batch conversion tool has also been updated to support LIDAR classification.


 


I've added a LAS Feature Extraction Tool.  This tool will allow the user to extract/export any or all 18 LAS classifications from a LAS point cloud so that they can be modeled/mapped independently of each other.  For example, all vegetation can be extracted for modeling or study, or all roads, railways and bridges can be extracted for traffic studies.  Of course it also allows the user to extract just the ground returns for terrain modeling or mapping as well.


 


See the feature extraction tool here:  http://lidarwidgets.com/#!page-feature-extraction


 


Another tool that I've added is called Mesh2Contour.  It allows the user to create contour maps in DXF format from a mesh file that was created by my LAS to Mesh generation tools.


 


See an output example here:  http://lidarwidgets.com/#!page-2dcontours






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