| 摘要 |
A system for configuring orientation and storing criteria corresponding to vector elements that form a boundary of a polygon is provided. This innovation can define the boundary of a polygon as individual vectors with implied "from-" and "to-" directionality and can store the vectors in a standard manner such that they are always aligned in a like orientation. This novel configuration and/or storage mechanism(s) can facilitate efficient spatial operations. Particularly, spatial operations can be enhanced by employing a single formula to compare a reference point to any of the vectors forming the boundary when determining intersection with a boundary vector segment. Additionally, the innovation can employ a novel schema to store vector information into a relational database management system (RDBMS). As such, the data can be used for performing spatial selection operations such as the well-known Point-In-Polygon and Polygon-on-Polygon operations.
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