GRASS GIS 8.4.1dev Reference Manual: Topic surface

Topic: surface

r.contour	Produces a vector map of specified contours from a raster map.
r.fill.stats	Rapidly fills 'no data' cells (NULLs) of a raster map with interpolated values (IDW).
r.fillnulls	Fills no-data areas in raster maps using spline interpolation.
r.random.surface	Generates random surface(s) with spatial dependence.
r.resamp.bspline	Performs bilinear or bicubic spline interpolation with Tykhonov regularization.
r.surf.area	Prints estimation of surface area for raster map.
r.surf.contour	Generates surface raster map from rasterized contours.
r.surf.fractal	Creates a fractal surface of a given fractal dimension.
r.surf.gauss	Generates a raster map using gaussian random number generator.
r.surf.idw	Provides surface interpolation from raster point data by Inverse Distance Squared Weighting.
r.surf.random	Produces a raster surface map of uniform random deviates with defined range.
v.surf.bspline	Performs bicubic or bilinear spline interpolation with Tykhonov regularization.
v.surf.idw	Provides surface interpolation from vector point data by Inverse Distance Squared Weighting.
v.surf.rst	Performs surface interpolation from vector points map by splines.

See also the corresponding keyword surface for additional references.