The contraints for boundaries of the the different regions

Boundaries are represented as the equation of a 3D plane, intersecting the unit sphere. These intersections are great and small circles. THe representation is in terms of a 4-vector, (x,y,z,c), where (x,y,z) are the components of a 3D normal vector pointing along the normal of the plane into the half-scape inside our boundary, and c is the shift of the plane along the normal from the origin. Thus, c=0 constraints represent great circles. If c<0, the small circle contains more than half of the sky. See also the Region and RegionConvex tables

Index TypeKey or Field List
primary keyconstraintid
foreign keyRegion(regionID)
covering indexregionID, convexID, x, y, z, c