# TransformedSkyWcsMaker¶

class lsst.meas.astrom.TransformedSkyWcsMaker(inputSkyWcs)

Bases: object

Convenience class for appending a shifting an input SkyWcs on sky and appending an affine transform.

The class assumes that all frames are sequential and are mapped one to the next.

Parameters: input_sky_wcs : lsst.afw.geom.SkyWcs WCS to decompose and append affine matrix and shift in on sky location to.

Methods Summary

 makeWcs(crvalOffset, affMatrix) Apply a shift and affine transform to the WCS internal to this class.

Methods Documentation

makeWcs(crvalOffset, affMatrix)

Apply a shift and affine transform to the WCS internal to this class.

A new SkyWcs with these transforms applied is returns.

Parameters: crval_shift : numpy.ndarray, (2,) Shift in radians to apply to the Wcs origin/crvals. aff_matrix : ‘numpy.ndarray’, (3, 3) Affine matrix to apply to the mapping/transform to add to the WCS. outputWcs : lsst.afw.geom.SkyWcs Wcs with a final shift and affine transform applied.