lsst.skymap
ga8c6da7877+aa12a14d27
Loading...
Searching...
No Matches
python
lsst
skymap
detail
wcsFactory.py
Go to the documentation of this file.
1
#
2
# LSST Data Management System
3
# Copyright 2008, 2009, 2010 LSST Corporation.
4
#
5
# This product includes software developed by the
6
# LSST Project (http://www.lsst.org/).
7
#
8
# This program is free software: you can redistribute it and/or modify
9
# it under the terms of the GNU General Public License as published by
10
# the Free Software Foundation, either version 3 of the License, or
11
# (at your option) any later version.
12
#
13
# This program is distributed in the hope that it will be useful,
14
# but WITHOUT ANY WARRANTY; without even the implied warranty of
15
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16
# GNU General Public License for more details.
17
#
18
# You should have received a copy of the LSST License Statement and
19
# the GNU General Public License along with this program. If not,
20
# see <http://www.lsstcorp.org/LegalNotices/>.
21
#
22
23
__all__ = [
'WcsFactory'
]
24
25
import
lsst.geom
as
geom
26
import
lsst.afw.geom
as
afwGeom
27
28
29
class
WcsFactory
:
30
"""A factory for creating Wcs objects for the sky tiles.
31
32
Parameters
33
----------
34
pixelScale : `lsst.geom.Angle`
35
Desired scale, as sky/pixel.
36
projection : `str`
37
FITS-standard 3-letter name of projection, e.g.: TAN (tangent),
38
STG (stereographic), MOL (Mollweide's), AIT (Hammer-Aitoff)
39
see Representations of celestial coordinates in FITS
40
(Calabretta and Greisen, 2002).
41
rotation : `lsst.geom.Angle`
42
Rotation relative to cardinal.
43
flipX : `bool`
44
Flip the X axis?
45
"""
46
47
def
__init__
(self, pixelScale, projection, rotation=0*geom.radians, flipX=False):
48
if
len(projection) != 3:
49
raise
RuntimeError(
"projection=%r; must have length 3"
% (projection,))
50
self.
_projection
= projection
51
self.
_cdMatrix
= afwGeom.makeCdMatrix(scale=pixelScale, orientation=rotation, flipX=flipX)
52
53
def
makeWcs
(self, crPixPos, crValCoord):
54
"""Make a Wcs.
55
56
Parameters
57
----------
58
crPixPos : `lsst.geom.Point2D`
59
crPix for WCS, using the LSST standard.
60
crValCoord : `lsst.geom.SpherePoint`
61
ICRS crVal for WCS.
62
63
Returns
64
-------
65
results : `lsst.afw.geom.SkyWcs`
66
The new SkyWcs object.
67
"""
68
return
afwGeom.makeSkyWcs(crpix=crPixPos, crval=crValCoord,
69
cdMatrix=self.
_cdMatrix
, projection=self.
_projection
)
lsst.skymap.detail.wcsFactory.WcsFactory
Definition
wcsFactory.py:29
lsst.skymap.detail.wcsFactory.WcsFactory.makeWcs
makeWcs(self, crPixPos, crValCoord)
Definition
wcsFactory.py:53
lsst.skymap.detail.wcsFactory.WcsFactory.__init__
__init__(self, pixelScale, projection, rotation=0 *geom.radians, flipX=False)
Definition
wcsFactory.py:47
lsst.skymap.detail.wcsFactory.WcsFactory._cdMatrix
_cdMatrix
Definition
wcsFactory.py:51
lsst.skymap.detail.wcsFactory.WcsFactory._projection
_projection
Definition
wcsFactory.py:50
lsst::afw::geom
lsst::geom
Generated on Thu Mar 28 2024 03:05:43 for lsst.skymap by
1.10.0