CalibrationMapping¶

class lsst.obs.base.CalibrationMapping(datasetType, policy, registry, calibRegistry, calibRoot, dataRoot=None, **kwargs)¶

CalibrationMapping is a Mapping subclass for calibration-type products.

The difference is that data properties in the query or template can be looked up using a reference Mapping in addition to this one.

CalibrationMapping Policies can contain the following:

reference (string, optional): a list of tables for finding missing dataset identifier components (including the observation time, if a validity range is required) in the exposure registry; note that the “tables” entry refers to the calibration registry
refCols (string, optional): a list of dataset properties required from the reference tables for lookups in the calibration registry
validRange (bool): true if the calibration dataset has a validity range specified by a column in the tables of the reference dataset in the exposure registry) and two columns in the tables of this calibration dataset in the calibration registry)
obsTimeName (string, optional): the name of the column in the reference dataset tables containing the observation time (default “taiObs”)
validStartName (string, optional): the name of the column in the calibration dataset tables containing the start of the validity range (default “validStart”)
validEndName (string, optional): the name of the column in the calibration dataset tables containing the end of the validity range (default “validEnd”)

Parameters:

datasetType : str: Butler dataset type to be mapped.
policy : daf_persistence.Policy or pexPolicy.Policy: Mapping Policy (pexPolicy only for backward compatibility)
registry : lsst.obs.base.Registry: Registry for metadata lookups
calibRegistry : lsst.obs.base.Registry: Registry for calibration metadata lookups.
calibRoot : str: Path of calibration root directory.
dataRoot : str: Path of data root directory; used for outputs only.

Methods Summary

`lookup`(properties, dataId)	Look up properties for in a metadata registry given a partial dataset identifier.
`map`(mapper, dataId[, write])	Standard implementation of map function.
`standardize`(mapper, item, dataId)

Methods Documentation

lookup(properties, dataId)¶

Look up properties for in a metadata registry given a partial dataset identifier.

Parameters:	properties : `list` of `str` Properties to look up. dataId : `dict` Dataset identifier.
Returns:	`list` of `tuple` Values of properties.

map(mapper, dataId, write=False)¶

Standard implementation of map function.

Parameters:	mapper: `lsst.daf.persistence.Mapper` Object to be mapped. dataId: `dict` Dataset identifier.
Returns:	lsst.daf.persistence.ButlerLocation Location of object that was mapped.