LSST Applications g0b6bd0c080+a72a5dd7e6,g1182afd7b4+2a019aa3bb,g17e5ecfddb+2b8207f7de,g1d67935e3f+06cf436103,g38293774b4+ac198e9f13,g396055baef+6a2097e274,g3b44f30a73+6611e0205b,g480783c3b1+98f8679e14,g48ccf36440+89c08d0516,g4b93dc025c+98f8679e14,g5c4744a4d9+a302e8c7f0,g613e996a0d+e1c447f2e0,g6c8d09e9e7+25247a063c,g7271f0639c+98f8679e14,g7a9cd813b8+124095ede6,g9d27549199+a302e8c7f0,ga1cf026fa3+ac198e9f13,ga32aa97882+7403ac30ac,ga786bb30fb+7a139211af,gaa63f70f4e+9994eb9896,gabf319e997+ade567573c,gba47b54d5d+94dc90c3ea,gbec6a3398f+06cf436103,gc6308e37c7+07dd123edb,gc655b1545f+ade567573c,gcc9029db3c+ab229f5caf,gd01420fc67+06cf436103,gd877ba84e5+06cf436103,gdb4cecd868+6f279b5b48,ge2d134c3d5+cc4dbb2e3f,ge448b5faa6+86d1ceac1d,gecc7e12556+98f8679e14,gf3ee170dca+25247a063c,gf4ac96e456+ade567573c,gf9f5ea5b4d+ac198e9f13,gff490e6085+8c2580be5c,w.2022.27
LSST Data Management Base Package
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Classes | |
class | _MockTestCase |
Functions | |
def | approximateWcs (wcs, bbox, order=3, nx=20, ny=20, iterations=3, skyTolerance=0.001 *lsst.geom.arcseconds, pixelTolerance=0.02, useTanWcs=False) |
def lsst.meas.astrom.approximateWcs.approximateWcs | ( | wcs, | |
bbox, | |||
order = 3 , |
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nx = 20 , |
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ny = 20 , |
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iterations = 3 , |
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skyTolerance = 0.001*lsst.geom.arcseconds , |
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pixelTolerance = 0.02 , |
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useTanWcs = False |
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) |
Approximate an existing WCS as a TAN-SIP WCS The fit is performed by evaluating the WCS at a uniform grid of points within a bounding box. Parameters ---------- wcs : `lsst.afw.geom.SkyWcs` wcs to approximate bbox : `lsst.geom.Box2I` the region over which the WCS will be fit order : `int` order of SIP fit nx : `int` number of grid points along x ny : `int` number of grid points along y iterations : `int` number of times to iterate over fitting skyTolerance : `lsst.geom.Angle` maximum allowed difference in world coordinates between input wcs and approximate wcs (default is 0.001 arcsec) pixelTolerance : `float` maximum allowed difference in pixel coordinates between input wcs and approximate wcs (default is 0.02 pixels) useTanWcs : `bool` send a TAN version of wcs to the fitter? It is documented to require that, but I don't think the fitter actually cares Returns ------- fitWcs : `lsst.afw.geom.SkyWcs` the fit TAN-SIP WCS
Definition at line 43 of file approximateWcs.py.