EOPF Zarr Community Notebook Competition

Test out the power of cloud-native Sentinel data through the winning notebooks from the EOPF Toolkit competition.

The challenge invited participants to create educational Jupyter Notebooks showcasing what is possible with Sentinel-1, Sentinel-2 and Sentinel-3 data in Zarr format. From practical workflows to creative demonstrations, the winning notebooks are now published and available to explore.

Whether you are an EO expert moving towards cloud-native workflows or just starting to experiment with Sentinel data in the cloud, these notebooks offer a hands-on way to learn from real examples.

What the community built with the
EOPF Toolkit

The EOPF Zarr Community Notebook Competition has now concluded. The winning notebooks show what becomes possible when open Copernicus Sentinel data, shared tools and cloud-native workflows come together.

5 winning educational notebooks selected
from the community
S1 · S2 · S3 workflows using Sentinel-1, Sentinel-2 and Sentinel-3 data
Zarr practical examples for cloud-native Earth observation analysis

Explore the workflows

Browse the published notebooks and start experimenting with cloud-native Sentinel data in Zarr format.

Explore the notebooks

From prize challenge to published workflows

The EOPF Zarr Community Notebook Competition has now concluded. The winning notebooks are being shared as practical learning resources for the EO community, showing how Sentinel data in Zarr format can support reproducible, cloud-native analysis.

Featured in EOPF 101

Winning notebooks are now shared as educational resources for the community.

Community recognition

Authors are highlighted for practical, reproducible cloud-native workflows.

Upskilling support

thriveGEO sponsored a €10,000 prize pool in upskilling vouchers.

ESA-supported swag

Community prizes included Sentinel-themed swag sponsored by ESA.

Competition Details

Submissions Closed

15 Mar 2026, 23:59 (UTC+1)

Watch the official EOPF submission walkthrough to see the full process in action.

EOPF Toolkit Logo

FAQ

The EOPF Zarr Community Notebook Competition brings together Sentinel data users to showcase the power of cloud-native workflows using Sentinel data. This initiative is part of the EOPF Toolkit, brought to you by the European Space Agency, Development Seed, Sparkgeo and thriveGEO. 

The EOPF Zarr Sample Service provides a way to access Earth observation data in the cloud-native Zarr format. This allows for fast, efficient data analysis without having to download large files.

Absolutely not! This competition is specifically designed for Sentinel data users who are new to cloud-native workflows. The EOPF 101 book and our support channels will provide all the resources you need to get up to speed.

Yes, you can. You'll be able to form teams during the learning and development phase of the competition. We'll encourage participants to use the Discourse forum to connect with potential teammates.

There is a prize pool of 10 000 Euros worth of upskilling vouchers provided by thriveGEO. In addition to prizes, winning notebooks will be featured in the EOPF 101 book and showcased at the awards ceremony, giving you visibility within the Earth observation community. You will be given the chance to be a co-author of a publication on EOPF 101.

We'll be offering support through our dedicated Slack workspace, live online office hours, and guided co-working sessions. Stay tuned for more details on these support channels.

Eligibility

  • The competition is open to individuals and teams.
  • All participants must register through the official registration form.
  • Submissions must be a Jupyter Notebook (.ipynb file).
  • The notebook must be functional and reproducible.
  • The notebook must make use of the EOPF Zarr Sample Service data.
  • The notebook may incorporate one or more EOPF plugins, though this is not a mandatory requirement.
  • All code must be original or be clearly cited. All AI use must be disclosed.
  • By submitting a notebook, you grant the European Space Agency and thriveGEO GmbH a non-exclusive license to use, reproduce, modify, and display your work for promotional and educational purposes, including featuring it in the EOPF 101 online book.

Submissions will be judged on the following criteria:

  • Technical Soundness: Does the notebook work as intended and demonstrate a complete workflow? (30 points)
  • Effective Use of EOPF Sentinel Zarr Data: How well does the notebook leverage the unique advantages of the EOPF Zarr format? (30 points)
  • Educational Quality: Is the notebook well-documented and easy for others to understand and learn from? (40 points)

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Contact Info

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