22from lsst.daf.butler
import Butler
28def makeDiscreteSkyMap(repo, config_file, collections, instrument,
29 skymap_id='discrete', old_skymap_id=None):
30 """Implements the command line interface `butler make-discrete-skymap` subcommand,
31 should only be called by command line tools and unit test code that tests
34 Constructs a skymap
from calibrated exposure
in the butler repository
39 URI to the location to read the repo.
40 config_file : `str`
or `
None`
41 Path to a config file that contains overrides to the skymap config.
42 collections : `list` [`str`]
43 An expression specifying the collections to be searched (
in order) when
44 reading datasets,
and optionally dataset type restrictions on them.
45 At least one collection must be specified. This
is the collection
46 with the calibrated exposures.
48 The name
or fully-qualified
class name of an instrument.
49 skymap_id : `str`, optional
50 The identifier of the skymap to save. Default
is 'discrete'.
51 old_skymap_id : `str`, optional
52 The identifer of the skymap to append to. Must differ
from
53 ``skymap_id``. Ignored unless ``config.doAppend=
True``.
55 butler = Butler(repo, collections=collections, writeable=True)
56 instr = Instrument.from_string(instrument, butler.registry)
58 instr.applyConfigOverrides(MakeDiscreteSkyMapTask._DefaultName, config)
60 if config_file
is not None:
61 config.load(config_file)
66 if old_skymap_id
is None:
67 raise ValueError(
"old_skymap_id must be provided if config.doAppend is True.")
68 dataId = {
'skymap': old_skymap_id}
70 oldSkyMap = butler.get(BaseSkyMap.SKYMAP_DATASET_TYPE_NAME, collections=collections,
72 except LookupError
as e:
73 msg = (f
"Could not find seed skymap with dataId {dataId} "
74 f
"in collections {collections} but doAppend is {config.doAppend}. Aborting...")
75 raise LookupError(msg, *e.args[1:])
77 datasets = butler.registry.queryDatasets(
'calexp', collections=collections)
78 wcs_bbox_tuple_list = [(butler.getDirect(ref.makeComponentRef(
"wcs")),
79 butler.getDirect(ref.makeComponentRef(
"bbox")))
82 result = task.run(wcs_bbox_tuple_list, oldSkyMap)
83 result.skyMap.register(skymap_id, butler)