Issues/310

[wmwv]

Adds Run 1.2i Object catalogs along with simple scripts to document in detail. Parquet file DPDD files (simple format, one file for all tracts) for Run 1.2i and 1.2p. Documents how they were generated.

[yymao]

To be added as one of the steps (after the step of updating the reader):

We can use the reader to generate the schema files. Simply run:

import GCRCatalogs

for cat in ('dc2_object_run1.2i', 'dc2_object_run1.2i_all_columns'):
    GCRCatalogs.load(cat).generate_schema_yaml()

No further change to the reader is needed. The next time the same catalog is being loaded, the reader will automatically pick up the schema file.

[wmwv]

@yymao I've added a note about GCRCAtalogs.load_catalog(cat).generate_schema_yaml()

But how do the custom defaults get set?

[yymao]

@wmwv right now it is hard coded in https://github.com/LSSTDESC/gcr-catalogs/blob/master/GCRCatalogs/dc2_object.py#L544

[wmwv]

Ah, thanks. I had never quite tracked that down.

[wmwv]

@yymao Are there any other changes you'd like to see to this before merging?

[yymao]

@wmwv One minor comment -- for the Shifter image of DM+DESC environment section, do you want to just suggest the use of start-kernel-cli.py, so that we don't need to update this README when there are future updates to the DESC kernels. The usage is simply

python start-kernel-cli.py desc-stack

[wmwv]

I will mention start-kernel-cli.py here and use it with #315. But it's not actually what I did for regenerating Run 1.2i.