[GRASS-SVN] r30645 - grass/trunk/raster

[svn_grass at osgeo.org]

Author: neteler
Date: 2008-03-19 10:11:01 -0400 (Wed, 19 Mar 2008)
New Revision: 30645

Modified:
   grass/trunk/raster/rasterintro.html
Log:
interpolation part expanded

Modified: grass/trunk/raster/rasterintro.html
===================================================================
--- grass/trunk/raster/rasterintro.html	2008-03-19 14:02:41 UTC (rev 30644)
+++ grass/trunk/raster/rasterintro.html	2008-03-19 14:11:01 UTC (rev 30645)
@@ -130,20 +130,37 @@
 
 <h3>Raster map resampling and interpolation methods</h3>
 
-GRASS offers various raster resampling and interpolation methods:
+GRASS offers various raster resampling and interpolation methods. There are
+available modules for reinterpolation of "filled" raster maps (continuous data)
+to a different resolution:
 
 <ul>
 <li> Resampling with nearest neighbor, bilinear, and bicubic method
  (<a href="r.resamp.interp.html">r.resamp.interp</a>)</li>
+<li> Regularized spline with tension (RST) interpolation 2D
+ (<a href="r.resamp.rst.html">r.resamp.rst</a>)</li>
+<li> Regularized spline with tension (RST) interpolation 2D for hole filling (e.g., SRTM DEM)
+ (<a href="r.fillnulls.html">r.fillnulls</a>)</li>
+</ul>
+
+Furthermore, there are modules available for reinterpolation of "sparse"
+(scattered points or lines) maps:
+
+<ul>
 <li> Inverse distance weighted average (IDW) interpolation
  (<a href="r.surf.idw.html">r.surf.idw</a> and <a href="r.surf.idw2.html">r.surf.idw2</a>)</li>
-<li> Regularized spline with tension (RST) interpolation 2D
- (<a href="r.resamp.rst.html">r.resamp.rst</a>)</li>
-<li> Bilinear interpolation (<a href="r.bilinear.html">r.bilinear</a>)</li>
 <li> Interpolating from contour lines (<a href="r.contour.html">r.contour</a>)</li>
 </ul>
 
+For Lidar and similar data, <a href="r.in.xyz.html">r.in.xyz</a> supports loading
+and binning of ungridded x,y,z ASCII data into a new raster map. The user may choose from
+a variety of statistical methods in creating the new raster.
+<P>
 
+Otherwise, for interpolation of scattered data, use the <EM>v.surf.*</EM> set of
+modules.
+
+
 <h3>Hydrologic modeling toolbox</h3>
 
 Watershed modeling related modules are