calculateSipWcsHeader¶
- lsst.afw.geom.calculateSipWcsHeader(wcs, order, bbox, spacing, header=None)¶
Generate a SIP WCS header approximating a given
SkyWcs- Parameters:
- wcs
lsst.afw.geom.SkyWcs World Coordinate System to approximate as SIP.
- order
int SIP order (equal to the maximum sum of the polynomial exponents).
- bbox
lsst.geom.Box2I Bounding box over which to approximate the
wcs.- spacing
float Spacing between sample points.
- header
lsst.daf.base.PropertyList, optional Header to which to add SIP WCS keywords.
- wcs
- Returns:
- header
lsst.daf.base.PropertyList Header including SIP WCS keywords.
- header
Examples
>>> header = calculateSipWcsHeader(exposure.getWcs(), 3, exposure.getBBox(), 20) >>> sipWcs = SkyWcs(header)