Difference between revisions of "LIDAR"

From GRASS-Wiki
Jump to: navigation, search
(modules)
(Modules)
Line 3: Line 3:
 
=== Import ===
 
=== Import ===
  
* r.in.xyz ([http://hamish.bowman.googlepages.com/grassfiles#xyz example])
+
* [http://grass.ibiblio.org/grass63/manuals/html63_user/r.in.xyz.html r.in.xyz] - Create a raster map from an assemblage of many coordinates using univariate statistics.<BR>([http://hamish.bowman.googlepages.com/grassfiles#xyz example])
* v.in.ascii ''Limited to a few million data points unless topology is skipped''
+
 
 +
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.in.ascii.html v.in.ascii] - Import data from an ASCII file to GRASS vector format.<BR>''Limited to a few million data points unless topology and database creation is skipped''
  
 
=== Analysis ===
 
=== Analysis ===
  
* v.lidar.correction
+
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.lidar.edgedetection.html v.lidar.edgedetection] - Detect the object's edges from a LIDAR data set.
* v.lidar.edgedetection
+
 
* v.lidar.growing
+
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.lidar.growing.html v.lidar.growing] - Building contour determination and Region Growing algorithm for determining the building inside.
 +
 
 +
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.lidar.correction.html v.lidar.correction] - Correction of the v.lidar.growing output. It is the last of the three algorithms for LIDAR filtering.
  
 
=== Surface generation ===
 
=== Surface generation ===
  
* v.surf.rst
+
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.surf.rst.html v.surf.rst] - Spatial approximation and topographic analysis using regularized spline with tension.
* v.surf.idw
+
 
* r.fillnulls
+
* [http://grass.ibiblio.org/grass63/manuals/html63_user/v.surf.idw.html v.surf.idw] - Surface interpolation from vector point data by Inverse Distance Squared Weighting.
  
 +
* [http://grass.ibiblio.org/grass63/manuals/html63_user/r.fillnulls.html r.fillnulls] - Fills no-data areas in raster maps using v.surf.rst splines interpolation.
  
 
== Sample data ==
 
== Sample data ==

Revision as of 18:24, 3 December 2006

Modules

Import

  • r.in.xyz - Create a raster map from an assemblage of many coordinates using univariate statistics.
    (example)
  • v.in.ascii - Import data from an ASCII file to GRASS vector format.
    Limited to a few million data points unless topology and database creation is skipped

Analysis

  • v.lidar.growing - Building contour determination and Region Growing algorithm for determining the building inside.
  • v.lidar.correction - Correction of the v.lidar.growing output. It is the last of the three algorithms for LIDAR filtering.

Surface generation

  • v.surf.rst - Spatial approximation and topographic analysis using regularized spline with tension.
  • v.surf.idw - Surface interpolation from vector point data by Inverse Distance Squared Weighting.
  • r.fillnulls - Fills no-data areas in raster maps using v.surf.rst splines interpolation.

Sample data

Widely used in GRASS tutorials

Other

  • USGS Center for LIDAR Information Coordination and Knowledge (aka CLICK) - USGS LiDAR point cloud distribution site
    http://lidar.cr.usgs.gov
  • EarthScope Spatial Data Explorer - A java application for querying, browsing, and acquiring data from the EarthScope Spatial Data Repository. Currently includes a number of LiDAR datasets.
    http://www.earthscope.org/data/lidar.php