lsst.skymap.dodecaSkyMap.DodecaSkyMap Class Reference

Inheritance diagram for lsst.skymap.dodecaSkyMap.DodecaSkyMap:

Public Member Functions
def	__init__
def	__getstate__
def	__setstate__
def	findTract
def	getVersion
def	getWithTractsOnPoles

Static Public Attributes
	ConfigClass = DodecaSkyMapConfig

Private Attributes
	_dodecahedron

Static Private Attributes
tuple	_version = (1, 0)

Detailed Description

Dodecahedron-based sky map pixelization.
    
DodecaSkyMap divides the sky into 12 overlapping Tracts arranged as the faces of a dodecahedron.

Definition at line 47 of file dodecaSkyMap.py.

Constructor & Destructor Documentation

def lsst.skymap.dodecaSkyMap.DodecaSkyMap.__init__	(		self,
			config = None
	)

Construct a DodecaSkyMap

@param[in] config: an instance of self.ConfigClass; if None the default config is used

Definition at line 55 of file dodecaSkyMap.py.

    def __init__(self, config=None):
        """Construct a DodecaSkyMap

        @param[in] config: an instance of self.ConfigClass; if None the default config is used
        """
        BaseSkyMap.__init__(self, config)
        self._dodecahedron = detail.Dodecahedron(withFacesOnPoles = self.config.withTractsOnPoles)
        
        tractOverlap = afwGeom.Angle(self.config.tractOverlap, afwGeom.degrees)

        for id in range(12):
            tractVec = self._dodecahedron.getFaceCtr(id)
            tractCoord = detail.coordFromVec(tractVec, defRA=afwGeom.Angle(0))
            tractRA = tractCoord.getLongitude()
            vertexVecList = self._dodecahedron.getVertices(id)
            
            # make initial WCS; don't worry about crPixPos because TractInfo will shift it as required
            wcs = self._wcsFactory.makeWcs(crPixPos=afwGeom.Point2D(0,0), crValCoord=tractCoord)
            
            self._tractInfoList.append(
                TractInfo(
                    id = id,
                    patchInnerDimensions = self.config.patchInnerDimensions,
                    patchBorder = self.config.patchBorder,
                    ctrCoord = tractCoord,
                    vertexCoordList = [detail.coordFromVec(vec, defRA=tractRA) for vec in vertexVecList],
                    tractOverlap = tractOverlap,
                    wcs = wcs,
                )
            )