EOPF Tutorial at BiDS'25

EOPF Sample Service Getting Started with Zarr¶

Date: September 29, 2025 | Time: 1:30 pm - 5:00 pm | Location: Room 103, BiDS25, Riga, Latvia

🎯 Tutorial Objectives¶

• Introduce Cloud-Native Workflows: Explain the paradigm shift from traditional, file-based workflows to scalable, cloud-native analysis using formats like zarr to overcome the challenges of processing large-scale Earth observation data.

• Data Discovery with STAC: Provide practical skills in using the EOPF STAC catalog’s web interface and programmatic tools (like pystac-client) to find and filter Earth observation data efficiently.

• Discover the newly developed plugins: Get an overview of the xarray EOPF backend, the xcube EOPF data store, the GDAL EOPF reader, and a Julia EOPF re

• Build Practical Data Analysis Skills: Guide participants through a hands-on, end-to-end workflow based in Python libraries such as xarray and zarr to perform a real-world analysis (e.g., wildfire monitoring), showcasing the integration of STAC and zarr.

Familiarize Yourself:¶

New to EOPF? No problem!

• Start with EOPF 101: https://eopf-toolkit.github.io/eopf-101/ - Essential introduction to the EOPF ecosystem

• Browse available datasets in the STAC catalog (11 different Sentinel collections!)

• Review example notebooks: EOPF Sample Notebooks

• Check out the GitHub repository: https://github.com/EOPF-Sample-Service/eopf-sample-notebooks

🚀 Pre-Tutorial Setup (Complete Before start)¶

Essential Registration Steps:¶

1. Register for Copernicus Data Space Ecosystem: https://dataspace.copernicus.eu

2. Access JupyterHub Environment: https://jupyterhub.user.eopf.eodc.eu/hub

3. Explore the STAC Browser: https://stac.browser.user.eopf.eodc.eu

📅 Detailed Agenda¶

13:30-14:00: Introduction¶

• About Cloud Optimised Formats Overview of cloud-optimised formats, focusing on their role in enabling FAIR data principles.

• Zarr introduction to Sentinel We will delve into the Zarr format as applied to Sentinel data.

• Chunking for Optimisation This topic covers the fundamental concept of chunking and its importance in optimising data access.

14:00 - 15:00: Data Discovery¶

• STAC EOPF Catalog Exploring Guided demo on how to explore the web interface of the EOPF STAC catalog.

• Python STAC Access Guided walk for generating the connection to the EOPF STAC Catalog Endpoint through Python.

15:00 - 15:30: EOPF Zarr Plugins for easy acess¶

Overview on the availabe plugins deveolped by EOPF Sample Service. Short handons demos for each plugin:

• xarray EOPF backend

• xcube EOPF data store

• GDAL EOPF Reader

• Julia Reader

15:30 - 16:30: Wildfire in Sardinia¶

Guided example of how to integrate Sentinel products into a specific use case.

Support on replicating the workflow with provided case studies.

16:30 - 17:00: Wrap-up & Summary¶

Key takeaways on how Zarr and STAC together form a powerful, cloud-native ecosystem that directly supports data-driven decision-making and contributes to the goals of open science and interoperability in the BIDS community.

Breaks are considered along the event 😉

🛠️ Technical Resources¶

Getting Help:¶

• EOPF team members available throughout the day

• New to EOPF? Start with EOPF 101 for core concepts

• Slack channel: #eopf-hackathon (link provided on-site)

• Documentation: EOPF Sample Notebooks

Data Available:¶

• Real Copernicus Sentinel data in Zarr format

• Global coverage with recent acquisitions

• All processing levels from L1 to L2

• Optimized chunking for cloud processing

🔄 After the Tutorial¶

Stay Connected:¶

Join ongoing discussions and join the EOPF Community Support Platform on Discourse