Review Existing Toolsets and Match with Technical Objectives

[rajadain]

• [x] Study the following:

  • https://github.com/NOAA-OWP/inundation-mapping
  • https://docs.hyriver.io/

• [x] Investigate if there is a Zarr dataset for NWM Predictions

• [x] Match with our existing technical objectives and see what the gaps are.

[rajadain]

Based on the following:

• https://water.noaa.gov/about/nwm
• https://water.noaa.gov/about/output_file_contents
• https://registry.opendata.aws/noaa-nwm-pds/
• https://github.com/awslabs/open-data-docs/tree/main/docs/noaa/noaa-nwm-pds

The NWM Predictions are only available in NetCDF, and not in Zarr.

They have an experimental map on the website https://water.noaa.gov/map that fails to load stream data:

[rajadain]

As far as I can tell, Inundation Mapping née Cahaba downloads the NWM files locally, then ogr2ogr's them into a workable format before using them. It does not do cloud-friendly reads. Will keep looking.

https://github.com/NOAA-OWP/inundation-mapping/blob/2ecf528194017e5729074e2113f74f5a95cd586f/src/acquire_and_preprocess_inputs.py#L131-L157

[rajadain]

HyRiver seems to completely cover objective 3-1: NHD Library https://github.com/azavea/noaa-hydro-data/issues/35#issuecomment-1204083650, and partially cover 3-2: WBD Library https://github.com/azavea/noaa-hydro-data/issues/36#issuecomment-1204151147.