Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.

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.*

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