Coverage for python/lsst/skymap/detail/wcsFactory.py : 42%

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# # LSST Data Management System # Copyright 2008, 2009, 2010 LSST Corporation. # # This product includes software developed by the # LSST Project (http://www.lsst.org/). # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the LSST License Statement and # the GNU General Public License along with this program. If not, # see <http://www.lsstcorp.org/LegalNotices/>. #
"""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? """
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)
"""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) |