EOPF Hackathon at BiDS'25

Get ready to hack together!¶

Date: September 30, 2025 | Time: 09:00 am - 5:00 pm | Location: Room 401, BiDS25, Riga, Latvia

🎯 Hackathon Objectives¶

Transform how we access and process Copernicus Sentinel data using cloud-native technologies! This hackathon event focuses on:

Exploring the EOPF Sentinel Zarr Samples Service and its diverse datasets;
Developing new Jupyter notebooks that leverage the existing EOPF Sample datasets;
Experimenting with Discrete Global Grid Systems (DGGS), particularly HEALPix, starting from EOPF Sample datasets;

Familiarize Yourself:¶

New to EOPF? No problem! Make sure to attend the EOPF Sample Service - Getting Started with Zarr (Sep 29, 01:30 PM - 05:00 PM, Room 103).

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-Hackathon Setup (Complete Before 09:00)¶

Essential Registration Steps:¶

Register for Copernicus Data Space Ecosystem: https://dataspace.copernicus.eu
Access JupyterHub Environment: https://jupyterhub.user.eopf.eodc.eu/hub
Explore the STAC Browser: https://stac.browser.user.eopf.eodc.eu

📅 Detailed Agenda¶

🌅 Morning Session (09:00 - 12:30)¶

09:00 - 09:30: Welcome & Team Formation¶

Welcome & Introductions (15 min)
Quick Overview: EOPF ecosystem and Zarr Samples Service capabilities
New to EOPF? Quick reference to EOPF 101 for foundational concepts
Team Formation: Based on interests and proposed projects (see Project Ideas below)

09:30 - 10:30: Data Exploration Sprint¶

Hands-on exploration of the STAC browser
Discover available datasets:
- Sentinel-1 (GRD, SLC, OCN)
- Sentinel-2 (Level-1C, Level-2A)
- Sentinel-3 OLCI & SLSTR products
Identify data for your project ideas and agree on the use case you would like to work on.

10:30 - 10:45: ☕ Coffee Break¶

10:45 - 12:30: Project Kickoff¶

Finalize team projects and register them as GitHub issues
Download the official notebook template: template.ipynb
Review contribution guidelines (see Contribution Guidelines below)
Begin coding: Start with existing examples and adapt to your use case
Technical support available from EOPF team

🍽️ 12:30 - 13:30: Lunch Break¶

🌞 Afternoon Session (13:30 - 17:00)¶

13:30 - 15:30: Deep Development¶

Intensive coding session
Experiment with:
- Multi-source data fusion
- DGGS/HEALPix implementations
- Advanced chunking strategies
- Zarr optimization techniques
Collaborative problem-solving

15:30 - 15:45: ☕ Coffee Break¶

15:45 - 16:30: Project Presentations¶

5-minute team presentations of developed notebooks
Demo your solutions and key findings
Community feedback and discussion

16:30 - 17:00: Wrap-up & Next Steps¶

Reflection on achievements
Discussion of future development
Community notebook competition introduction
Closing remarks

18:00 - 18:30: Celebration & Awards¶

💡 Project Ideas & Team Formation¶

How to Participate:¶

Browse Existing Challenges: Check our GitHub Issues for predefined problems
Propose New Ideas: Create a new issue describing your project concept
Join a Team: Comment on issues you’re interested in contributing to

🎯 Suggested Project Themes:¶

Multi-Mission Data Fusion¶

Combine Sentinel-1 SAR with Sentinel-2 optical data for enhanced land cover mapping
Integrate Sentinel-3 ocean products with meteorological data

DGGS Applications¶

Implement HEALPix gridding for global climate monitoring
Develop DGGS-based data aggregation workflows

Performance Optimization¶

Optimize chunking strategies for different use cases
Benchmark Zarr vs. traditional formats

Novel Applications¶

Time-series analysis across multiple Sentinel missions
Machine learning pipelines using cloud-native data
Interactive visualization dashboards

Metadata & Standards¶

Explore Parquet for metadata storage
Contribute to GeoZarr and CF-conventions discussions

🤝 Team Formation Process:¶

Before the hackathon:

Create or comment on GitHub issues with your interests
Use issue labels: hackathon-2025, team-wanted, dggs, multi-mission, etc.

During the hackathon:

Teams of 2-4 people work best
Mix of skills encouraged (data scientists, developers, domain experts)
One designated team lead for coordination

🛠️ Technical Resources¶

Available Tools & Libraries:¶

Data Access / Processing: STAC, xarray, Dask, EOPF toolkit (e.g. xarray-eopf, xcube-eopf, EOPF Julia Reader)
Visualization: Matplotlib, Plotly, Folium
Languages: Python, Julia
Grid Systems: HEALPix, DGGS implementations
Templates: Official Jupyter notebook template (required for all submissions)

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

📋 Project Registration¶

Create Your Project Issue:¶

Use this template when creating a new GitHub issue:

**Project Title**: [Your innovative project name]

**Team Members**: [@github-username1, @github-username2, ...]

**Objective**: [Brief description of what you want to achieve]

**Data Sources**: [Which Sentinel missions/products you'll use]

**Technical Approach**: [Tools, methods, or algorithms you plan to explore]

**Expected Outcome**: [Jupyter notebook, visualization, analysis results, etc.]

**Skills Needed**: [What expertise would be helpful for your team]

**Labels**: hackathon-2025, [add relevant tags: dggs, multi-mission, performance, etc.]