[GRASS-dev] [GRASS GIS] #742: v.coregister / v.align : A module to translate and rotate a point cloud to best match one another

[GRASS GIS]

#742: v.coregister / v.align : A module to translate and rotate a point cloud to
best match one another
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 Reporter:  stevensj             |       Owner:  grass-dev at lists.osgeo.org
     Type:  enhancement          |      Status:  new                      
 Priority:  normal               |   Milestone:  6.4.0                    
Component:  Vector               |     Version:  unspecified              
 Keywords:  lidar, point, cloud  |    Platform:  Unspecified              
      Cpu:  Unspecified          |  
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 Often LiDAR data is collected as strips (e.g. airborne), or point clouds
 with different sources (e.g. ground-based).  When the two files are
 combined they might be slightly offset, resulting in nasty artefacts.  It
 would be excellent to have a module that would allow one point cloud to be
 adjusted to best fit another one.  The same module would also be able to
 pin a dataset to ground control points.

 Speaking to people working with airborne lidar, I have found the
 misregistration to be a common problem.  It can also be an issue when
 combining datasets from different sources e.g. LiDAR and SRTM.  I think
 that commercial LiDAR packages for ground-based scanners may have
 something like this, but as far as I know there is nothing for airborne
 stuff.

 The module may work by requiring the user to select points to match in
 each dataset.  It could then return to parameters to give the best fit.
 This might be parameters to match A to B, B to A or turn both into some
 intermediate.  It would also carry out the transformation if necessary.
 Maybe the parameters could be calculated on a thinned dataset to reduce
 processing time.  A more advanced version might be able to pick the points
 automatically and to do some warping of the cloud, too.

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Ticket URL: <http://trac.osgeo.org/grass/ticket/742>
GRASS GIS <http://grass.osgeo.org>