ConvertPixelToArcseconds¶
- class lsst.pipe.tasks.functors.ConvertPixelToArcseconds(col, colCD_1_1, colCD_1_2, colCD_2_1, colCD_2_2, **kwargs)¶
Bases:
ComputePixelScale
Convert a value in units of pixels to units of arcseconds.
Attributes Summary
Columns required to perform calculation.
str(object='') -> str str(bytes_or_buffer[, encoding[, errors]]) -> str
Do not explode by band if used on object table.
Short name of functor (suitable for column name/dict key).
Methods Summary
__call__
(data[, dropna])Call self as a function.
computeDeltaRaDec
(x, y, cd11, cd12, cd21, cd22)Compute the distance on the sphere from x2, y1 to x1, y1.
computeSkySeparation
(ra1, dec1, ra2, dec2)Compute the local pixel scale conversion.
difference
(data1, data2, **kwargs)Computes difference between functor called on two different DataFrame/Handle objects.
fail
(df)getSkySeparationFromPixel
(x1, y1, x2, y2, ...)Compute the distance on the sphere from x2, y1 to x1, y1.
multilevelColumns
(data[, columnIndex, ...])Returns columns needed by functor from multilevel dataset.
pixelScaleArcseconds
(cd11, cd12, cd21, cd22)Compute the local pixel to scale conversion in arcseconds.
Attributes Documentation
- columns¶
- name¶
- noDup¶
Do not explode by band if used on object table.
- shortname¶
Short name of functor (suitable for column name/dict key).
Methods Documentation
- __call__(data, dropna=False)¶
Call self as a function.
- computeDeltaRaDec(x, y, cd11, cd12, cd21, cd22)¶
Compute the distance on the sphere from x2, y1 to x1, y1.
- Parameters:
- x
Series
X pixel coordinate.
- y
Series
Y pixel coordinate.
- cd11
Series
[1, 1] element of the local Wcs affine transform.
- cd11
Series
[1, 1] element of the local Wcs affine transform.
- cd12
Series
[1, 2] element of the local Wcs affine transform.
- cd21
Series
[2, 1] element of the local Wcs affine transform.
- cd22
Series
[2, 2] element of the local Wcs affine transform.
- x
- Returns:
- raDecTupletuple
RA and dec conversion of x and y given the local Wcs. Returned units are in radians.
- computeSkySeparation(ra1, dec1, ra2, dec2)¶
Compute the local pixel scale conversion.
- difference(data1, data2, **kwargs)¶
Computes difference between functor called on two different DataFrame/Handle objects.
- fail(df)¶
- getSkySeparationFromPixel(x1, y1, x2, y2, cd11, cd12, cd21, cd22)¶
Compute the distance on the sphere from x2, y1 to x1, y1.
- Parameters:
- x1
Series
X pixel coordinate.
- y1
Series
Y pixel coordinate.
- x2
Series
X pixel coordinate.
- y2
Series
Y pixel coordinate.
- cd11
Series
[1, 1] element of the local Wcs affine transform.
- cd11
Series
[1, 1] element of the local Wcs affine transform.
- cd12
Series
[1, 2] element of the local Wcs affine transform.
- cd21
Series
[2, 1] element of the local Wcs affine transform.
- cd22
Series
[2, 2] element of the local Wcs affine transform.
- x1
- Returns:
- Distance
Series
Arcseconds per pixel at the location of the local WC.
- Distance
- multilevelColumns(data, columnIndex=None, returnTuple=False)¶
Returns columns needed by functor from multilevel dataset.
To access tables with multilevel column structure, the
DeferredDatasetHandle
orInMemoryDatasetHandle
needs to be passed either a list of tuples or a dictionary.- Parameters:
- datavarious
The data as either
DeferredDatasetHandle
, orInMemoryDatasetHandle
.- columnIndex (optional): pandas `~pandas.Index` object
Either passed or read in from
DeferredDatasetHandle
.- `returnTuple`
bool
If true, then return a list of tuples rather than the column dictionary specification. This is set to
True
byCompositeFunctor
in order to be able to combine columns from the various component functors.
- pixelScaleArcseconds(cd11, cd12, cd21, cd22)¶
Compute the local pixel to scale conversion in arcseconds.
- Parameters:
- cd11
Series
[1, 1] element of the local Wcs affine transform in radians.
- cd11
Series
[1, 1] element of the local Wcs affine transform in radians.
- cd12
Series
[1, 2] element of the local Wcs affine transform in radians.
- cd21
Series
[2, 1] element of the local Wcs affine transform in radians.
- cd22
Series
[2, 2] element of the local Wcs affine transform in radians.
- cd11
- Returns:
- pixScale
Series
Arcseconds per pixel at the location of the local WC.
- pixScale