# Geometry 3D

Function | Description |
---|---|

`ST_3DArea` |
Return a polygon's 3D area |

`ST_3DLength` |
Return the 3D length of a Linestring |

`ST_3DPerimeter` |
Return the 3D perimeter of a (multi)polygon |

`ST_AddZ` |
Add a value to the z-coordinate of a Geometry |

`ST_ConstrainedDelaunay` |
Compute a constrained Delaunay triangulation based on a geometry |

`ST_Delaunay` |
Compute a Delaunay triangulation based on points |

`ST_Drape` |
Drape a geometry to a set of triangles |

`ST_Extrude` |
Extrude a geometry |

`ST_Force3D` |
2D Geometry → 3D Geometry |

`ST_GeometryShadow` |
Compute the shadow footprint for a single geometry |

`ST_Interpolate3DLine` |
Return a Geometry with a interpolation of z values. |

`ST_Is3D` |
Return 1 if a Geometry has at least one z-coordinate; 0 otherwise |

`ST_MultiplyZ` |
Return a Geometry's z-values by a factor |

`ST_Reverse3DLine` |
Potentially reverse a Geometry according to the z-values of its first and last coordinates |

`ST_SVF` |
Compute the Sky View Factor |

`ST_SunPosition` |
Compute the sun position |

`ST_Tessellate` |
Tessellate a set of Polygon with adaptive triangles |

`ST_TriangleAspect` |
Return the aspect of a triangle |

`ST_TriangleContouring` |
Split triangles into smaller triangles according to classes |

`ST_TriangleDirection` |
Compute the direction of steepest ascent of a triangle |

`ST_TriangleSlope` |
Compute the slope of a triangle as a percentage |

`ST_UpdateZ` |
Update the z-values of a Geometry |

`ST_Voronoi` |
Create a Voronoi diagram. |

`ST_Z` |
Return the z-value of the first coordinate of a Geometry |

`ST_ZMax` |
Return the maximum z-value of a Geometry |

`ST_ZMin` |
Return the minimum z-value of a Geometry |

`ST_ZUpdateLineExtremities` |
Update the start and end z-values of a Geometry |

Documented functions: 27/27.