| Defines the attributes of the patches of a given region |
| Regions are the union of convex hulls and are defined in the Region table. Convexes are the intersection of halfspaces defined by the HalfSpace table. Each convex is then broken up into a set of Patches, with their own bounding circle. See also the Region table |
| Index Type | Key or Field List |
| primary key | regionid, convexid, patchid |
| foreign key | Region(regionID) |
| covering index | htmID, ra, dec, x, y, z, type |