C.G.I. might have been a good use of his social capital and charm, but the model does become tricky if he is the spouse of someone who gets to decide, for example, what direction relations with India might take.
In this study, direction relations about uncertain regions, i.e., approximate direction relations, are modeled as the combinations of four crisp direction relations.
Direction relations between extended spatial objects are important commonsense knowledge.
The results indicate that the new interior boundary direction relations and its compositions with exterior direction relations are powerful in describing and deriving direction relations between overlapped and contained regions.
Thus, the direction relations between overlapping and contained regions cannot be effectively described and derived.
Existing models of direction relations are mainly designed to handle crisp regions.
We focus our efforts on the composition operator for two cardinal direction relations.
Both crisp and uncertain parts are used to simplify and handle the composition and the query of uncertain direction relations.
Then, we consider progressively more expressive classes of cardinal direction relations and give consistency-based composition algorithms for these classes.
Current models of direction relations are not designed to describe direction information inside the Minimum Bounding Rectangle (MBR) of a reference region.
Shape and spatial relationship features are: area (A), length/width (LW), shape index (SI), roundness (R), density (D), metric relations (MR), and direction relations (DR).
