Qualitative Spatial Reasoning with Directional and Topological Relations

Table 3

Conversion table between CSD-9 directional and RCC-8 topological relations.

Directional relations	Topological relations
O	EQ, PO, TPP, NTPP, TPPi, NTPPi
N, NE, E, SE, S, SW, W, NW	DC, EC, PO