SkyWcs¶

class lsst.afw.geom.SkyWcs¶

Bases: lsst.afw.typehandling.Storable

Attributes Summary

`isFits`
`isFlipped`

Methods Summary

`copyAtShiftedPixelOrigin`(self, shift)
`getCdMatrix`(args, *kwargs)	Overloaded function.
`getFitsMetadata`(self, precise)
`getFrameDict`(self)
`getPixelOrigin`(self)
`getPixelScale`(args, *kwargs)	Overloaded function.
`getRelativeRotationToWcs`(otherWcs)	Get the difference in sky rotation angle to the specified wcs.
`getSkyOrigin`(self)
`getTanWcs`(self, pixel)
`getTransform`(self)
`isPersistable`(self)
`linearizePixelToSky`(args, *kwargs)	Overloaded function.
`linearizeSkyToPixel`(args, *kwargs)	Overloaded function.
`pixelToSky`(args, *kwargs)	Overloaded function.
`pixelToSkyArray`(x, y[, degrees])	Convert numpy array pixels (x, y) to numpy array sky (ra, dec) positions.
`readFits`(args, *kwargs)	Overloaded function.
`readString`(arg0)
`skyToPixel`(args, *kwargs)	Overloaded function.
`skyToPixelArray`(ra, dec[, degrees])	Convert numpy array sky (ra, dec) positions to numpy array pixels (x, y).
`writeFits`(args, *kwargs)	Overloaded function.
`writeString`(self)

Attributes Documentation

isFits¶

isFlipped¶

Methods Documentation

copyAtShiftedPixelOrigin(self: lsst.afw.geom.SkyWcs, shift: lsst.geom.Extent2D) → lsst.afw.geom.SkyWcs¶

getCdMatrix(*args, **kwargs)¶

Overloaded function.

getCdMatrix(self: lsst.afw.geom.SkyWcs, pixel: lsst.geom.Point2D) -> numpy.ndarray[numpy.float64[2, 2]]
getCdMatrix(self: lsst.afw.geom.SkyWcs) -> numpy.ndarray[numpy.float64[2, 2]]

getFitsMetadata(self: lsst.afw.geom.SkyWcs, precise: bool = False) → lsst.daf.base.propertyContainer.propertyList.PropertyList¶

getFrameDict(self: lsst.afw.geom.SkyWcs) → astshim.frameDict.FrameDict¶

getPixelOrigin(self: lsst.afw.geom.SkyWcs) → lsst.geom.Point2D¶

getPixelScale(*args, **kwargs)¶

Overloaded function.

getPixelScale(self: lsst.afw.geom.SkyWcs, pixel: lsst.geom.Point2D) -> lsst.geom.Angle
getPixelScale(self: lsst.afw.geom.SkyWcs) -> lsst.geom.Angle

getRelativeRotationToWcs(otherWcs)¶

Get the difference in sky rotation angle to the specified wcs.

Ignoring location on the sky, if another wcs were atop this one, what would the difference in rotation be? i.e. for

otherWcs = createInitialSkyWcsFromBoresight(radec, rotation, detector)

what is the value that needs to be added to self.rotation (or subtracted from other.rotation`) to align them?

Parameters:	otherWcs : `lsst.afw.geom.SkyWcs` The wcs to calculate the angle to.
Returns:	angle : `lsst.geom.Angle` The angle between this and the supplied wcs, over the half-open range [0, 2pi).

getSkyOrigin(self: lsst.afw.geom.SkyWcs) → lsst.geom.SpherePoint¶

getTanWcs(self: lsst.afw.geom.SkyWcs, pixel: lsst.geom.Point2D) → lsst.afw.geom.SkyWcs¶

getTransform(self: lsst.afw.geom.SkyWcs) → lsst.afw.geom.TransformPoint2ToSpherePoint¶

isPersistable(self: lsst.afw.geom.SkyWcs) → bool¶

linearizePixelToSky(*args, **kwargs)¶

Overloaded function.

linearizePixelToSky(self: lsst.afw.geom.SkyWcs, coord: lsst.geom.SpherePoint, skyUnit: lsst.geom.AngleUnit) -> lsst.geom.AffineTransform
linearizePixelToSky(self: lsst.afw.geom.SkyWcs, coord: lsst.geom.Point2D, skyUnit: lsst.geom.AngleUnit) -> lsst.geom.AffineTransform

linearizeSkyToPixel(*args, **kwargs)¶

Overloaded function.

linearizeSkyToPixel(self: lsst.afw.geom.SkyWcs, coord: lsst.geom.SpherePoint, skyUnit: lsst.geom.AngleUnit) -> lsst.geom.AffineTransform
linearizeSkyToPixel(self: lsst.afw.geom.SkyWcs, coord: lsst.geom.Point2D, skyUnit: lsst.geom.AngleUnit) -> lsst.geom.AffineTransform

pixelToSky(*args, **kwargs)¶

Overloaded function.

pixelToSky(self: lsst.afw.geom.SkyWcs, pixel: lsst.geom.Point2D) -> lsst.geom.SpherePoint
pixelToSky(self: lsst.afw.geom.SkyWcs, x: float, y: float) -> lsst.geom.SpherePoint
pixelToSky(self: lsst.afw.geom.SkyWcs, pixel: List[lsst.geom.Point2D]) -> List[lsst.geom.SpherePoint]

pixelToSkyArray(x, y, degrees=False)¶

Convert numpy array pixels (x, y) to numpy array sky (ra, dec) positions.

Parameters:	x : `np.ndarray` Array of x values. y : `np.ndarray` Array of y values. degrees : `bool`, optional Return ra, dec arrays in degrees if True.
Returns:	ra : `np.ndarray` Array of Right Ascension. Units are radians unless degrees=True. dec : `np.ndarray` Array of Declination. Units are radians unless degrees=True.

static readFits(*args, **kwargs)¶

Overloaded function.

readFits(fileName: str, hdu: int = -2147483648) -> lsst.afw.geom.SkyWcs
readFits(manager: lsst.afw.fits._fits.MemFileManager, hdu: int = -2147483648) -> lsst.afw.geom.SkyWcs

static readString(arg0: str) → lsst.afw.geom.SkyWcs¶

skyToPixel(*args, **kwargs)¶

Overloaded function.

skyToPixel(self: lsst.afw.geom.SkyWcs, sky: lsst.geom.SpherePoint) -> lsst.geom.Point2D
skyToPixel(self: lsst.afw.geom.SkyWcs, sky: List[lsst.geom.SpherePoint]) -> List[lsst.geom.Point2D]

skyToPixelArray(ra, dec, degrees=False)¶

Convert numpy array sky (ra, dec) positions to numpy array pixels (x, y).

Parameters:	ra : `np.ndarray` Array of Right Ascension. Units are radians unless degrees=True. dec : `np.ndarray` Array of Declination. Units are radians unless degrees=True. degrees : `bool`, optional Input ra, dec arrays are degrees if True.
Returns:	x : `np.ndarray` Array of x values. y : `np.ndarray` Array of y values.

writeFits(*args, **kwargs)¶

Overloaded function.

writeFits(self: lsst.afw.geom.SkyWcs, fileName: str, mode: str = ‘w’) -> None
writeFits(self: lsst.afw.geom.SkyWcs, manager: lsst.afw.fits._fits.MemFileManager, mode: str = ‘w’) -> None

writeString(self: lsst.afw.geom.SkyWcs) → str¶

Navigation

SkyWcs¶