MeteoSwiss/rad4alp_zarr_database
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README.md

MSRAD-ZARR

A Python tool to process MeteoSwiss radar products (ODIM HDF5 and Metranet, in ZIP archives) into a consolidated Zarr archive for efficient analysis with xarray.

Features

  • Reads daily radar products (ZIP/HDF5/Metranet).
  • Converts to xarray.Dataset with proper coordinates and metadata.
  • Aligns products on a common grid and time reference.
  • Adds missing variables as NaNs for consistency.
  • Writes results into a chunked Zarr store (appendable by time).
  • Parallel processing with configurable workers.

Usage

python radar2zarr.py \
    --cfgpath config.yaml \
    --starttime 20230101 \
    --endtime 20230105

Folder structure

  • populate_zarr_db.py: main script
  • run.sbatch: example SLURM job to populate database
  • config: examples of configuration files
  • postproc: set of scripts to postprocess the database (concat zarrs, rechunking, etc)
  • examples_extraction: set of scripts to perform operations on the zarr (watershed extraction for example)
  • geodata: contains geojson files of watersheds