# topic_surface.1grass man page

## Topic: surface

*Note: see also the corresponding keyword surface for additional references.*

r.contour | Produces a vector map of specified contours from a raster map. | |

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. |

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© 2003-2016 GRASS Development Team, GRASS GIS 7.0.4 Reference Manual