Meteorology: Difference between revisions

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(+Visualizing Terrain Surface Indicies with Scaled Arrows)
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* [[IconSymbols#Weather_symbols|Weather symbols]] to use with GRASS display and cartography modules
* [[IconSymbols#Weather_symbols|Weather symbols]] to use with GRASS display and cartography modules


* Work in progress: {{AddonCmd|d.barb}}: Displays wind barbs or variable length straw diagrams given either two raster maps, or vector point data. Like {{cmd|d.rast.arrow}}, input data is given as magnitude and direction, unlike ''d.rast.arrow'' you can also feed it u,v component data.  (Hamish)
* Work in progress: {{AddonCmd|d.barb}}: Displays wind barbs or variable length straw diagrams given either two raster maps, or vector point data. Like {{cmd|d.rast.arrow}}, input data is given as magnitude and direction, unlike ''d.rast.arrow'' you can also feed it u,v component data.  (Hamish), See also [http://casoilresource.lawr.ucdavis.edu/drupal/node/989 Visualizing Terrain Surface Indicies with Scaled Arrows].


[[Image:D_rast_arrow_magnitude.png|thumb|right|200px|d.rast.arrow at work]]
[[Image:D_rast_arrow_magnitude.png|thumb|right|200px|d.rast.arrow at work]]

Revision as of 14:56, 7 September 2012

Meteorology

GRASS used together with R-stats provides a powerful toolset to analyse meteorological time series and to perform spatio-temporal interpolation.


d.rast.arrow at work
  • r.series - useful for time series analysis of raster data.
  • v.surf.rst - useful for 2D spline interpolation between sparse data points.