WriteSourceTableTask¶

WriteSourceTableTask converts table of sources measured on a calexp (dataset src) to a parquet file. All data is copied without transformation, and column names are unchanged, except for the "id" column, which is replaced by a DataFrame index.

It is the first of three postprocessing tasks to convert a src table to a per-visit Source Table that conforms to the standard data model. The second is TransformSourceTableTask, and the third is ConsolidateSourceTableTask.

Processing summary¶

WriteSourceTableTask reads in the src table, calls its asAstropy method to produce a DataFrame, and writes it out in parquet format.

Python API summary¶

from lsst.pipe.tasks.postprocess import WriteSourceTableTask

classWriteSourceTableTask(*, config=None, log=None, initInputs=None, **kwargs): Write source table to DataFrame Parquet format...

attributeconfig: Access configuration fields and retargetable subtasks.

methodrun(catalog, ccdVisitId=None, **kwargs): Convert `src` catalog to DataFrame...

Butler datasets¶

When run through the runQuantum method, WriteSourceTableTask obtains datasets from the input Butler data repository and persists outputs to the output Butler data repository. Note that configurations for WriteSourceTableTask, and its subtasks, affect what datasets are persisted and what their content is.

Input datasets¶

src: Full depth source catalog (lsst.afw.table) produced by ProcessCcdTask

Output datasets¶

source: Full depth source catalog (parquet)

Retargetable subtasks¶

No subtasks.

Configuration fields¶

connections¶

Data type: lsst.pipe.base.config.Connections
Field type: ConfigField

Configurations describing the connections of the PipelineTask to datatypes

idGenerator¶

Data type: lsst.meas.base._id_generator.DetectorVisitIdGeneratorConfig
Field type: ConfigField

Configuration for how to generate catalog IDs from data IDs.

saveLogOutput¶

Default: True
Field type: bool Field

Flag to enable/disable saving of log output for a task, enabled by default.

saveMetadata¶

Default: True
Field type: bool Field

Flag to enable/disable metadata saving for a task, enabled by default.

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