createInitialSkyWcs

lsst.obs.base.createInitialSkyWcs(visitInfo, detector, flipX=False)

Create a SkyWcs from the visit information and detector geometry.

A typical usecase for this is to create the initial WCS for a newly-read raw exposure.

Parameters:

visitInfo : lsst.afw.image.VisitInfo

Where to get the telescope boresight and rotator angle from.

detector : lsst.afw.cameraGeom.Detector

Where to get the camera geomtry from.

flipX : bool, optional

If False, +X is along W, if True +X is along E.

Returns:

skyWcs : lsst.afw.geom.SkyWcs

The new composed WCS.

Raises:

InitialSkyWcsError

Raised if there is an error generating the SkyWcs, chained from the lower-level exception if available.