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SFCGAL

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About

SFCGAL is a C++ wrapper library around CGAL with the aim of supporting ISO 19107:2013 and OGC Simple Features Access 1.2 for 3D operations.

SFCGAL provides standard compliant geometry types and operations. PostGIS uses the C API, to expose some SFCGAL's functions in spatial databases (cf. PostGIS manual).

Supported Geometry Types

Geometry coordinates have an exact rational number representation and can be either 2D or 3D. Among supported geometry types are:

  • Points
  • LineStrings
  • Polygons
  • TriangulatedSurfaces
  • PolyhedralSurfaces
  • GeometryCollections
  • Solids

Supported Operations

Supported operations include:

  • WKT reading and writing with exact rational number representation for coordinates
  • Intersection operations and predicates
  • Convex hull computation
  • Tessellation
  • Extrusion
  • Area and distance computation
  • Minkowski sums
  • Contour offsets
  • Straight skeleton generations

License

SFCGAL is distributed under the terms of the GNU Lesser General Public License 2+.

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