LIDAR: Difference between revisions
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=== Import === | === Import === | ||
* r.in.xyz | * [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. | * [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. | |||
* 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 | |||
* [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 02:24, 4 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.edgedetection - Detect the object's edges from a LIDAR data set.
- 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
- United States Antarctic Resource Center: LIDAR High-resolution DEM Final DATA Downloads
http://usarc.usgs.gov/lidar_dload.shtml
- LIDAR ALSM Research, Arizona State University Ative Tectonics, Research Group
http://lidar.asu.edu/research.html and http://www.geongrid.org/science/lidar.html
- USGS Center for LIDAR Information Coordination and Knowledge (aka CLICK) - USGS LiDAR point cloud distribution site
http://lidar.cr.usgs.gov
- Washington State Geospatial Data Archive, Mount Saint Helens - Lidar Data
https://wagda.lib.washington.edu/data/type/elevation/lidar/st_helens/
- Puget Sound Lidar Consortium, public-domain high-resolution topography for western Washington
http://pugetsoundlidar.ess.washington.edu/index.htm
- NOAA Topographic Change Mapping LIDAR Data Retrieval Tool (LDART) NOAA Coastal Services Center
http://maps.csc.noaa.gov/TCM/
- Landmap, LIDAR Data from the Environment Agency
http://www.landmap.ac.uk/lidar/lidar.html
- Northern California LIDAR data
http://quake.usgs.gov/research/geology/lidar/ and http://core2.gsfc.nasa.gov/lidar/terrapoint/
- IDAHO GEOSPATIAL , Bare Earth LIDAR DEM Download - UTM
http://inside.uidaho.edu/geodata/LiDAR/LiDARBareEarthDEM_DownloadUTM.htm
- 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