LocalWcs¶
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class
lsst.pipe.tasks.functors.LocalWcs(colCD_1_1, colCD_1_2, colCD_2_1, colCD_2_2, **kwargs)¶ Bases:
lsst.pipe.tasks.functors.FunctorComputations using the stored localWcs.
Attributes Summary
columnsColumns required to perform calculation namenoDupshortnameShort 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. computeSkySeperation(ra1, dec1, ra2, dec2)Compute the local pixel scale conversion. difference(data1, data2, **kwargs)Computes difference between functor called on two different ParquetTable objects fail(df)getSkySeperationFromPixel(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 Attributes Documentation
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columns¶ Columns required to perform calculation
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name= 'LocalWcsOperations'¶
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noDup¶
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shortname¶ Short name of functor (suitable for column name/dict key)
Methods Documentation
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__call__(data, dropna=False)¶ Call self as a function.
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computeDeltaRaDec(x, y, cd11, cd12, cd21, cd22)¶ Compute the distance on the sphere from x2, y1 to x1, y1.
Parameters: - x :
pandas.Series X pixel coordinate.
- y :
pandas.Series Y pixel coordinate.
- cd11 :
pandas.Series [1, 1] element of the local Wcs affine transform.
- cd11 :
pandas.Series [1, 1] element of the local Wcs affine transform.
- cd12 :
pandas.Series [1, 2] element of the local Wcs affine transform.
- cd21 :
pandas.Series [2, 1] element of the local Wcs affine transform.
- cd22 :
pandas.Series [2, 2] element of the local Wcs affine transform.
Returns: - raDecTuple : tuple
RA and dec conversion of x and y given the local Wcs. Returned units are in radians.
- x :
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computeSkySeperation(ra1, dec1, ra2, dec2)¶ Compute the local pixel scale conversion.
Parameters: - ra1 :
pandas.Series Ra of the first coordinate in radians.
- dec1 :
pandas.Series Dec of the first coordinate in radians.
- ra2 :
pandas.Series Ra of the second coordinate in radians.
- dec2 :
pandas.Series Dec of the second coordinate in radians.
Returns: - dist :
pandas.Series Distance on the sphere in radians.
- ra1 :
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difference(data1, data2, **kwargs)¶ Computes difference between functor called on two different ParquetTable objects
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fail(df)¶
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getSkySeperationFromPixel(x1, y1, x2, y2, cd11, cd12, cd21, cd22)¶ Compute the distance on the sphere from x2, y1 to x1, y1.
Parameters: - x1 :
pandas.Series X pixel coordinate.
- y1 :
pandas.Series Y pixel coordinate.
- x2 :
pandas.Series X pixel coordinate.
- y2 :
pandas.Series Y pixel coordinate.
- cd11 :
pandas.Series [1, 1] element of the local Wcs affine transform.
- cd11 :
pandas.Series [1, 1] element of the local Wcs affine transform.
- cd12 :
pandas.Series [1, 2] element of the local Wcs affine transform.
- cd21 :
pandas.Series [2, 1] element of the local Wcs affine transform.
- cd22 :
pandas.Series [2, 2] element of the local Wcs affine transform.
Returns: - Distance :
pandas.Series Arcseconds per pixel at the location of the local WC
- x1 :
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multilevelColumns(data, columnIndex=None, returnTuple=False)¶ Returns columns needed by functor from multilevel dataset
To access tables with multilevel column structure, the
MultilevelParquetTableorDeferredDatasetHandleneed to be passed either a list of tuples or a dictionary.Parameters: - data :
MultilevelParquetTableorDeferredDatasetHandle - columnIndex (optional): 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
TruebyCompositeFunctorin order to be able to combine columns from the various component functors.
- data :
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