LSST Applications
21.0.0+04719a4bac,21.0.0-1-ga51b5d4+f5e6047307,21.0.0-11-g2b59f77+a9c1acf22d,21.0.0-11-ga42c5b2+86977b0b17,21.0.0-12-gf4ce030+76814010d2,21.0.0-13-g1721dae+760e7a6536,21.0.0-13-g3a573fe+768d78a30a,21.0.0-15-g5a7caf0+f21cbc5713,21.0.0-16-g0fb55c1+b60e2d390c,21.0.0-19-g4cded4ca+71a93a33c0,21.0.0-2-g103fe59+bb20972958,21.0.0-2-g45278ab+04719a4bac,21.0.0-2-g5242d73+3ad5d60fb1,21.0.0-2-g7f82c8f+8babb168e8,21.0.0-2-g8f08a60+06509c8b61,21.0.0-2-g8faa9b5+616205b9df,21.0.0-2-ga326454+8babb168e8,21.0.0-2-gde069b7+5e4aea9c2f,21.0.0-2-gecfae73+1d3a86e577,21.0.0-2-gfc62afb+3ad5d60fb1,21.0.0-25-g1d57be3cd+e73869a214,21.0.0-3-g357aad2+ed88757d29,21.0.0-3-g4a4ce7f+3ad5d60fb1,21.0.0-3-g4be5c26+3ad5d60fb1,21.0.0-3-g65f322c+e0b24896a3,21.0.0-3-g7d9da8d+616205b9df,21.0.0-3-ge02ed75+a9c1acf22d,21.0.0-4-g591bb35+a9c1acf22d,21.0.0-4-g65b4814+b60e2d390c,21.0.0-4-gccdca77+0de219a2bc,21.0.0-4-ge8a399c+6c55c39e83,21.0.0-5-gd00fb1e+05fce91b99,21.0.0-6-gc675373+3ad5d60fb1,21.0.0-64-g1122c245+4fb2b8f86e,21.0.0-7-g04766d7+cd19d05db2,21.0.0-7-gdf92d54+04719a4bac,21.0.0-8-g5674e7b+d1bd76f71f,master-gac4afde19b+a9c1acf22d,w.2021.13
LSST Data Management Base Package
|
Classes | |
class | BoxGrid |
class | FrameSetInfo |
class | PermutedFrameSet |
class | TransformTestBaseClass |
Functions | |
def | makeSipPolyMapCoeffs (metadata, name) |
def | makeSipIwcToPixel (metadata) |
def | makeSipPixelToIwc (metadata) |
def lsst.afw.geom.testUtils.makeSipIwcToPixel | ( | metadata | ) |
Make an IWC to pixel transform with SIP distortion from FITS-WCS metadata This function is primarily intended for unit tests. IWC is intermediate world coordinates, as described in the FITS papers. Parameters ---------- metadata : lsst.daf.base.PropertySet FITS metadata describing a WCS with inverse SIP coefficients Returns ------- lsst.afw.geom.TransformPoint2ToPoint2 Transform from IWC position to pixel position (zero-based) in the forward direction. The inverse direction is not defined. Notes ----- The inverse SIP terms APn_m, BPn_m are polynomial coefficients x^n y^m for computing transformed x, y respectively. If we call the resulting polynomial inverseSipPolynomial, the returned transformation is: pixelPosition = pixel origin + uv + inverseSipPolynomial(uv) where uv = inverseCdMatrix * iwcPosition
Definition at line 196 of file testUtils.py.
def lsst.afw.geom.testUtils.makeSipPixelToIwc | ( | metadata | ) |
Make a pixel to IWC transform with SIP distortion from FITS-WCS metadata This function is primarily intended for unit tests. IWC is intermediate world coordinates, as described in the FITS papers. Parameters ---------- metadata : lsst.daf.base.PropertySet FITS metadata describing a WCS with forward SIP coefficients Returns ------- lsst.afw.geom.TransformPoint2ToPoint2 Transform from pixel position (zero-based) to IWC position in the forward direction. The inverse direction is not defined. Notes ----- The forward SIP terms An_m, Bn_m are polynomial coefficients x^n y^m for computing transformed x, y respectively. If we call the resulting polynomial sipPolynomial, the returned transformation is: iwcPosition = cdMatrix * (dxy + sipPolynomial(dxy)) where dxy = pixelPosition - pixelOrigin
Definition at line 235 of file testUtils.py.
def lsst.afw.geom.testUtils.makeSipPolyMapCoeffs | ( | metadata, | |
name | |||
) |
Return a list of ast.PolyMap coefficients for the specified SIP matrix The returned list of coefficients for an ast.PolyMap that computes the following function: f(dxy) = dxy + sipPolynomial(dxy)) where dxy = pixelPosition - pixelOrigin and sipPolynomial is a polynomial with terms `<name>n_m for x^n y^m` (e.g. A2_0 is the coefficient for x^2 y^0) Parameters ---------- metadata : lsst.daf.base.PropertySet FITS metadata describing a WCS with the specified SIP coefficients name : str The desired SIP terms: one of A, B, AP, BP Returns ------- list A list of coefficients for an ast.PolyMap that computes the specified SIP polynomial, including a term for out = in Note ---- This is an internal function for use by makeSipIwcToPixel and makeSipPixelToIwc
Definition at line 141 of file testUtils.py.