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

name type length unit ucd description

regionid bigint 8 Unique Region ID

convexid bigint 8 Unique Convex ID

patchid int 4 Unique patch number

type varchar 16 CAMCOL, RUN, STAVE, TILE, TILEBOX, SKYBOX, WEDGE, SECTOR...

radius float 8 arcmin radius of bounding circle centered at ra, dec

ra float 8 deg right ascension of observation

dec float 8 deg declination of observation

x float 8 x of centerpoint Normal unit vector in J2000

y float 8 y of centerpoint Normal unit vector in J2000

z float 8 z of centerpoint Normal unit vector in J2000

c float 8 offset of the equation of plane

htmid bigint 8 20 deep Hierarchical Triangular Mesh ID of centerpoint

area float 8 deg^2 area of the patch

convexString varchar -1 {x,y,z,c}+ representation of the convex of the patch

name	type	length	unit	ucd	description
regionid	bigint	8			Unique Region ID
convexid	bigint	8			Unique Convex ID
patchid	int	4			Unique patch number
type	varchar	16			CAMCOL, RUN, STAVE, TILE, TILEBOX, SKYBOX, WEDGE, SECTOR...
radius	float	8	arcmin		radius of bounding circle centered at ra, dec
ra	float	8	deg		right ascension of observation
dec	float	8	deg		declination of observation
x	float	8			x of centerpoint Normal unit vector in J2000
y	float	8			y of centerpoint Normal unit vector in J2000
z	float	8			z of centerpoint Normal unit vector in J2000
c	float	8			offset of the equation of plane
htmid	bigint	8			20 deep Hierarchical Triangular Mesh ID of centerpoint
area	float	8	deg^2		area of the patch
convexString	varchar	-1			{x,y,z,c}+ representation of the convex of the patch