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TABLE  RegionPatch

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

nametypelengthunitucddescription
regionidbigint8  Unique Region ID
convexidbigint8  Unique Convex ID
patchidint4  Unique patch number
typevarchar16  CAMCOL, RUN, STAVE, TILE, TILEBOX, SKYBOX, WEDGE, SECTOR...
radiusfloat8arcmin radius of bounding circle centered at ra, dec
rafloat8deg right ascension of observation
decfloat8deg declination of observation
xfloat8  x of centerpoint Normal unit vector in J2000
yfloat8  y of centerpoint Normal unit vector in J2000
zfloat8  z of centerpoint Normal unit vector in J2000
cfloat8  offset of the equation of plane
htmidbigint8  20 deep Hierarchical Triangular Mesh ID of centerpoint
areafloat8deg^2 area of the patch
convexStringvarchar-1  {x,y,z,c}+ representation of the convex of the patch