lsst.meas.astrom.anetBasicAstrometry Namespace Reference

Classes
class	InitialAstrometry
class	ANetBasicAstrometryConfig
class	ANetBasicAstrometryTask
	Basic implemeentation of the astrometry.net astrometrical fitter. More...

Functions
def	_createMetadata

Variables
list	__all__ = ["InitialAstrometry", "ANetBasicAstrometryConfig", "ANetBasicAstrometryTask"]

Function Documentation

def lsst.meas.astrom.anetBasicAstrometry._createMetadata (   bbox,   wcs,   filterName  )

private

Create match metadata entries required for regenerating the catalog

@param bbox  bounding box of image (pixels)
@param filterName Name of filter, used for magnitudes
@return Metadata

Definition at line 1008 of file anetBasicAstrometry.py.

def _createMetadata(bbox, wcs, filterName):
    """
    Create match metadata entries required for regenerating the catalog

    @param bbox  bounding box of image (pixels)
    @param filterName Name of filter, used for magnitudes
    @return Metadata
    """
    meta = dafBase.PropertyList()

    bboxD = afwGeom.Box2D(bbox)
    cx, cy = bboxD.getCenter()
    radec = wcs.pixelToSky(cx, cy).toIcrs()
    meta.add('RA', radec.getRa().asDegrees(), 'field center in degrees')
    meta.add('DEC', radec.getDec().asDegrees(), 'field center in degrees')
    pixelRadius = math.hypot(*bboxD.getDimensions())/2.0
    skyRadius = wcs.pixelScale() * pixelRadius
    meta.add('RADIUS', skyRadius.asDegrees(),
             'field radius in degrees, approximate')
    meta.add('SMATCHV', 1, 'SourceMatchVector version number')
    if filterName is not None:
        meta.add('FILTER', filterName, 'LSST filter name for tagalong data')
    return meta

Variable Documentation

list lsst.meas.astrom.anetBasicAstrometry.__all__ = ["InitialAstrometry", "ANetBasicAstrometryConfig", "ANetBasicAstrometryTask"]

Definition at line 25 of file anetBasicAstrometry.py.