Public Member Functions
	__init__ (self, pixelScale, projection, rotation=0 *geom.radians, flipX=False)

	makeWcs (self, crPixPos, crValCoord)

Protected Attributes
	_projection

	_cdMatrix

Detailed Description

A factory for creating Wcs objects for the sky tiles.

Parameters
----------
pixelScale : `lsst.geom.Angle`
    Desired scale, as sky/pixel.
projection : `str`
    FITS-standard 3-letter name of projection, e.g.: TAN (tangent),
    STG (stereographic), MOL (Mollweide's), AIT (Hammer-Aitoff)
    see Representations of celestial coordinates in FITS
    (Calabretta and Greisen, 2002).
rotation : `lsst.geom.Angle`
    Rotation relative to cardinal.
flipX : `bool`
    Flip the X axis?

Definition at line 29 of file wcsFactory.py.

Constructor & Destructor Documentation

◆ init()

lsst.skymap.detail.wcsFactory.WcsFactory.__init__	(	self,
		pixelScale,
		projection,
		rotation = 0*geom.radians,
		flipX = False )

Definition at line 47 of file wcsFactory.py.

    def __init__(self, pixelScale, projection, rotation=0*geom.radians, flipX=False):
        if len(projection) != 3:
            raise RuntimeError("projection=%r; must have length 3" % (projection,))
        self._projection = projection
        self._cdMatrix = afwGeom.makeCdMatrix(scale=pixelScale, orientation=rotation, flipX=flipX)
 

Member Function Documentation

◆ makeWcs()

lsst.skymap.detail.wcsFactory.WcsFactory.makeWcs	(	self,
		crPixPos,
		crValCoord )

Make a Wcs.

Parameters
----------
crPixPos : `lsst.geom.Point2D`
    crPix for WCS, using the LSST standard.
crValCoord : `lsst.geom.SpherePoint`
    ICRS crVal for WCS.

Returns
-------
results : `lsst.afw.geom.SkyWcs`
    The new SkyWcs object.

Definition at line 53 of file wcsFactory.py.

    def makeWcs(self, crPixPos, crValCoord):
        """Make a Wcs.
 
        Parameters
        ----------
        crPixPos : `lsst.geom.Point2D`
            crPix for WCS, using the LSST standard.
        crValCoord : `lsst.geom.SpherePoint`
            ICRS crVal for WCS.
 
        Returns
        -------
        results : `lsst.afw.geom.SkyWcs`
            The new SkyWcs object.
        """
        return afwGeom.makeSkyWcs(crpix=crPixPos, crval=crValCoord,
                                  cdMatrix=self._cdMatrix, projection=self._projection)

Member Data Documentation

◆ _cdMatrix

lsst.skymap.detail.wcsFactory.WcsFactory._cdMatrix

protected

Definition at line 51 of file wcsFactory.py.

◆ _projection

lsst.skymap.detail.wcsFactory.WcsFactory._projection

protected

Definition at line 50 of file wcsFactory.py.

The documentation for this class was generated from the following file:

/j/snowflake/release/lsstsw/stack/lsst-scipipe-8.0.0/Linux64/skymap/ga8c6da7877+ef4e3a5875/python/lsst/skymap/detail/wcsFactory.py

Public Member Functions

Protected Attributes