| Contains the arcs of a Region with their endpoints |
| An arc has two endpoints, specified via their equatorial coordinates, and the equation of the circle (x,y,z,c) of the arc. The arc is directed, the first point is the beginning, the second is the end. The arc belongs to a Region, a Convex and a patch. A patch is a contigous area of the sky. Within a patch the consecutive arcids represent a counterclockwise ordering of the vertices. |
| Index Type | Key or Field List |
| primary key | regionId, convexid, arcid |
| foreign key | Region(regionID) |