The package PlanGraph is devoted to planar graphs. Its main functionalities are:

• Works for planar graphs as well as oriented surfaces.
• Provide functionalities of snub, truncation, medial graph, inverse medial graph, dual graph, etc.
• Provide implementation of Lins dualities and a partial implementation of non-oriented surfaces.
• The incorporated list of basic archimedean planar graphs as well as some other particular classes
• The Goldberg-Coxeter construction and its algebraic formalism as explained in M. Dutour, M. Deza, Goldberg-Coxeter construction for 3- or 4-valent plane graphs, Electronic Journal of Combinatorics 11 (2004) R20