Documentation for DMR++ generation.

nasa / zarr-eosdis-store

Zarr data store for efficiently accessing NetCDF4 data from NASA’s Earth observing system in the cloud using the Zarr Python library

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Documentation for DMR++ generation. #11

Open betolink opened 3 years ago

betolink commented 3 years ago

I'm interested in generating DMR++ files for some HDF5 files, is there documentation on how to do this?

ndp-opendap commented 3 years ago

Look here: https://wiki.earthdata.nasa.gov/pages/viewpage.action?pageId=162369104

In particular section 6 of: https://docs.opendap.org/index.php?title=DMR%2B%2B

But you would be better served to read the previous sections because HDF5 is complex and not all features are supported.

bilts commented 3 years ago

Since I'm not sure everyone interested can reach the above wiki page, here are its contents and links

You can read about how to build and deploy dmr++ files at the OPeNDAP Wiki using the docker container OPeNDAP builds (https://docs.opendap.org/index.php?title=DMR%2B%2B)
Also you can read documentation on the Github site for the Cumulus task to read how to use that software to build the DMR++ (https://github.com/ghrcdaac/dmrpp-file-generator-docker#generate-dmrpp-files-locally)
The video of our NASA DMR++ workshop from 07/27/21 is on the OPeNDAP Google Drive. (https://drive.google.com/file/d/1prXBalvfvRkqVXzpa2_PE68s4l8tcXJF/view?usp=sharing)

bilts commented 3 years ago

It's also worth noting that if you're building DMR++ for the purpose of using this particular library, you may encounter issues with what this library supports, usually in the realm of decoder support. If you do, please file an issue!

betolink commented 3 years ago

thanks @bilts before I even attempt to generate custom DMR files I'd like to test the DMR++ files already generated for ICESat-2 data. I wonder if this eosdis store for zarr will handle reading subsetted queries to those granules.