LSST Applications
21.0.0-147-g0e635eb1+1acddb5be5,22.0.0+052faf71bd,22.0.0+1ea9a8b2b2,22.0.0+6312710a6c,22.0.0+729191ecac,22.0.0+7589c3a021,22.0.0+9f079a9461,22.0.1-1-g7d6de66+b8044ec9de,22.0.1-1-g87000a6+536b1ee016,22.0.1-1-g8e32f31+6312710a6c,22.0.1-10-gd060f87+016f7cdc03,22.0.1-12-g9c3108e+df145f6f68,22.0.1-16-g314fa6d+c825727ab8,22.0.1-19-g93a5c75+d23f2fb6d8,22.0.1-19-gb93eaa13+aab3ef7709,22.0.1-2-g8ef0a89+b8044ec9de,22.0.1-2-g92698f7+9f079a9461,22.0.1-2-ga9b0f51+052faf71bd,22.0.1-2-gac51dbf+052faf71bd,22.0.1-2-gb66926d+6312710a6c,22.0.1-2-gcb770ba+09e3807989,22.0.1-20-g32debb5+b8044ec9de,22.0.1-23-gc2439a9a+fb0756638e,22.0.1-3-g496fd5d+09117f784f,22.0.1-3-g59f966b+1e6ba2c031,22.0.1-3-g849a1b8+f8b568069f,22.0.1-3-gaaec9c0+c5c846a8b1,22.0.1-32-g5ddfab5d3+60ce4897b0,22.0.1-4-g037fbe1+64e601228d,22.0.1-4-g8623105+b8044ec9de,22.0.1-5-g096abc9+d18c45d440,22.0.1-5-g15c806e+57f5c03693,22.0.1-7-gba73697+57f5c03693,master-g6e05de7fdc+c1283a92b8,master-g72cdda8301+729191ecac,w.2021.39
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.