Function lsst::afw::geom::makeSkyWcs(lsst::geom::Point2D const&, lsst::geom::SpherePoint const&, Eigen::Matrix2d const&, std::string const&)

Function Documentation

std::shared_ptr<SkyWcs> lsst::afw::geom::makeSkyWcs(lsst::geom::Point2D const &crpix, lsst::geom::SpherePoint const &crval, Eigen::Matrix2d const &cdMatrix, std::string const &projection = "TAN")

Construct a simple FITS SkyWcs with no distortion

Parameters

  • [in] crpix: Center of projection on the CCD using the LSST convention: 0, 0 is the lower left pixel of the parent image

  • [in] crval: Center of projection on the sky

  • [in] cdMatrix: CD matrix, where element (i-1, j-1) corresponds to FITS keyword CDi_j and i, j have range [1, 2]. May be computed by calling makeCdMatrix.

  • [in] projection: The name of the FITS WCS projection, e.g. “TAN” or “STG”