AutoCAD Map 3D 2009 Geospatial Platform Reference
From AutoCAD Map 3D Geospatial Platform API
DE-9IM
[Glossary]
DE-9IM stands for Dimensionally Extended Nine-Intersection Model. This model is explained in [OGC99-049] . The model is used to define the intersection of two geometries in terms of their boundaries, interiors and exteriors.