lsst.obs.base

The lsst.obs.base module provides the framework and common API for telescope/camera specific “obs” packages. New cameras will derive from the classes defined here. lsst.obs.base.tests provides the tests that all “obs” packages should pass.

Contributing

lsst.obs.base is developed at https://github.com/lsst/obs_base. You can find Jira issues for this module under the obs_base component.

Command Line Scripts

convert_gen2_repo_to_gen3.py

Convert a gen2 butler repo to gen 3. See lsst.obs.base.ConvertRepoConfig for most of the config options.

usage: convert_gen2_repo_to_gen3.py [-h] --gen2root GEN2ROOT --gen3root
                                    GEN3ROOT [--skymapName SKYMAPNAME]
                                    [--skymapConfig SKYMAPCONFIG]
                                    [--calibs CALIBS]
                                    [--reruns [RERUNS [RERUNS ...]]]
                                    [--transferMode {auto,link,symlink,hardlink,copy,move,relsymlink}]
                                    [-v] [--calibFilterType CALIBFILTERTYPE]
                                    [-c CONFIG]
                                    lsst.obs.CAMERA.INSTRUMENT

positional arguments

lsst.obs.camera.instrument

The full import path to the gen3 Instrument class for this camera (e.g. lsst.obs.decam.DarkEnergyCamera).

optional arguments

-h, --help

show this help message and exit

--gen2root <gen2root>

Root path of the gen 2 repo to be converted.

--gen3root <gen3root>

Root path of the gen 3 repo to be produced.

--skymapName <skymapname>

Name of the new gen3 skymap (e.g. ‘discrete/ci_hsc’).

--skymapConfig <skymapconfig>

Path to skymap config file defining the new gen3 skymap.

--calibs <calibs>

Path to the gen 2 calibration repo; absolute, or relative to gen2root.

--reruns <reruns>

List of gen 2 reruns to convert.

--transferMode {auto,link,symlink,hardlink,copy,move,relsymlink}

Mode to use to transfer files into the new repository.

-v, --verbose

Set the log level to DEBUG.

--calibFilterType <calibfiltertype>

physical_filter or abstract_filter as the id in the gen2 calibRegistry.

-c <config>, --config <config>

Path to a ConvertRepoConfig override to be included after the Instrument config overrides are applied.

Python API reference

lsst.obs.base Package

Functions

addUnboundedCalibrationLabel(registry, …)	Add a special ‘unbounded’ calibration_label dimension entry for the given camera that is valid for any exposure.
bboxFromIraf(irafBBoxStr)	Return a Box2I corresponding to an IRAF-style BBOX
createInitialSkyWcs(visitInfo, detector[, flipX])	Create a SkyWcs from the telescope boresight and detector geometry.
exposureFromImage(image[, dataId, mapper, …])	Generate an Exposure from an image-like object
loadCamera(butler, dataId, Mapping[str, …)	Attempt to load versioned camera geometry from a butler, but fall back to obtaining a nominal camera from the Instrument class if that fails.
makeExposureRecordFromObsInfo(obsInfo, universe)	Construct an exposure DimensionRecord from astro_metadata_translator.ObservationInfo.
makeTransferChoiceField([doc, default])	Create a Config field with options for how to transfer files between data repositories.

Classes

CalibrationMapping(datasetType, policy, …)	CalibrationMapping is a Mapping subclass for calibration-type products.
CameraMapper(policy, repositoryDir[, root, …])	CameraMapper is a base class for mappers that handle images from a camera and products derived from them.
DatasetMapping(datasetType, policy, …)	DatasetMapping is a Mapping subclass for non-Exposure datasets that can be retrieved by the standard daf_persistence mechanism.
DefineVisitsConfig
DefineVisitsTask(config, *, butler, **kwargs)	Driver Task for defining visits (and their spatial regions) in Gen3 Butler repositories.
ExposureIdInfo([expId, expBits, maxBits])	Exposure ID and number of bits used.
ExposureMapping(datasetType, policy, …)	ExposureMapping is a Mapping subclass for normal exposures.
FilterDefinition(physical_filter, lambdaEff, …)	The definition of an instrument’s filter bandpass.
FilterDefinitionCollection(*filters)	An order-preserving collection of `FilterDefinition`s.
FitsRawFormatterBase(*args, **kwargs)	Abstract base class for reading and writing raw data to and from FITS files.
GroupExposuresConfig
GroupExposuresTask(config, **kwargs)	Abstract base class for the subtask of DefineVisitsTask that is responsible for grouping exposures into visits.
ImageMapping(datasetType, policy, registry, …)	ImageMapping is a Mapping subclass for non-camera images.
InitialSkyWcsError	For handling failures when creating a SkyWcs from a camera geometry and boresight.
Instrument(*args, **kwargs)	Base class for instrument-specific logic for the Gen3 Butler.
MakeRawVisitInfo([log, doStripHeader])	Base class functor to make a VisitInfo from the FITS header of a raw image.
MakeRawVisitInfoViaObsInfo([log, doStripHeader])	Base class functor to make a VisitInfo from the FITS header of a raw image using ObservationInfo translators.
Mapping(datasetType, policy, registry, …)	Mapping is a base class for all mappings.
RawIngestConfig
RawIngestTask(config, *, butler, **kwargs)	Driver Task for ingesting raw data into Gen3 Butler repositories.
VisitDefinitionData(instrument, id, name, …)	Struct representing a group of exposures that will be used to define a visit.

Class Inheritance Diagram