Function lsst::meas::astrom::transformWcsPixels

Function Documentation

std::shared_ptr<afw::geom::SkyWcs> lsst::meas::astrom::transformWcsPixels(afw::geom::SkyWcs const &wcs, geom::AffineTransform const &s)

Create a new SkyWcs whose pixel coordinate system has been transformed via an affine transform.

Return

a new Wcs that satisfies the following:

newWcs = transformWcsPixels(wcs, s);
assert(newWcs.skyToPixel(sky), s(wcs.skyToPixel(sky)));
assert(newWcs.pixelToSky(pixel), wcs.pixelToSky(s.inverted()(pixel)));

for all sky coordinates sky and pixel coordinates pixel.

Parameters

• [in] wcs: Original SkyWcs object.

• [in] s: AffineTransform to apply to the pixel coordinate system.