Summit Schedule

Five Days of Collaboration • October 13-17, 2025 • Rome, Italy

Summit Structure

The summit is designed as a progression from deep technical work to collaborative implementation, with developers strongly encouraged to participate in both phases to experience the complete journey from code to real-world impact.

Adopter Days: Collaboration & Implementation

Friday, October 17

Adopter Summit (workshops and breakout sessions)

Lightning talk presenters: please email slides to max@developmentseed.org

9:00 AM: Registration & welcome coffee

9:15 AM: From first steps to production

  • Workshop: Icechunk Deep Dive
  • Breakout group: Choosing if Zarr is right for you

10:30 AM: Break (30 minutes)

11:00 AM: Virtual and native Zarr

  • Workshop: Virtual Zarr for archival file formats
  • Breakout group: Native zarr features
    • Sharding
    • New data types
    • Migrating to Zarr V3
    • Chunk grids

12:00 PM: Lunch (catered)

1:00 PM: Lightning Talks

2:00 PM: Fine-tuning for your interests

  • Workshop: Optimizing Zarr Performance
  • Birds of a feather:
    • Machine Learning
    • Visualization
    • Earth sciences
    • Microscopy

3:00 PM: Break (30 minutes)

3:30 PM: Birds of a feather: Zarr languages, or build your own!

  • Zarr in Rust
  • Zarr in Python
  • Zarr in R
  • Zarr in Julia
  • Or, build your own!

4:00 PM: Zarr retrospective and vision driving

4:30 PM: Closing Remarks

4:45 PM: Summit conclusion

Thursday, October 16

Adopter Summit (Presentations, panels, and Q&As)

9:00 AM: Registration & welcome coffee

9:30 AM: Opening keynotes

  • Davis Bennett - From A to Zarr
  • Ryan Abernathey - What we need from Zarr 4

10:45 AM: Break

11:15 AM: Technical presentations: Zarr applications

  • Joe Hamman - How to make Zarr go zoom zoom
  • Max Jones - The GeoZarr challenge

11:45 AM: Audience Q&A

12:00 PM: Lunch (catered)

1:25 PM: Technical presentations: Tools leveraging the Zarr data format

  • Lachlan Deakin - zarrs: Zarr in the Rust Ecosystem
  • Sebastian Galkin - Icechunk, or how to put your Zarr data in production
  • Tom Nicholas - VirtualiZarr: A bridge from archival file formats to Zarr

2:30 PM: Inverse Panel: Zarr in Production

2:45 PM: Break

3:15 PM: Technical presentations: Featured use-cases

  • Norman Rzepka - Zarr for peta-scale neurobiology
  • Alessandro Amici - The Earth Data Hub: Fast access to massive climate and Earth observation datasets using Xarray and Zarr
  • Tobias Ferreira - Experiments at NOC with Browser-Based Zarr Visualization
  • Tina Odaka - Grid4Earth: Unifying DGGS and Zarr for Scalable, Interoperable Earth Data for DestinE and Copernicus Sentinel Data
  • Emmanuel Mathot - EOPF Explorer. Expand Zarr for dynamic vizualization of Copernicus Sentinel Data

4:45 PM: Wrap up & day 2 previews

5:00 PM: Day conclusion

6 - 8 PM: Aperitivo (snacks and beverages)

Developer Days: Technical Deep-Dives

Wednesday, October 15

Wrap-up & Roadmap

9:00 AM: Welcome

9:00 AM: Breakout groups

11:00 AM: Roadmap development

1:00 PM onwards: Free time in Rome

Evening: Happy hour with STAC!

Tuesday, October 14

Continued development work

9:00 AM: Welcome

9:30 AM: Review technical problems

10:00 AM: Breakout groups

11:30 AM: Group discussion

12:00 PM: Lunch (Catered)

1:00 PM: Breakout groups

4:30 PM: Group discussion

5:30 PM: Developer day concludes

Evening: Optional team dinner

Monday, October 13

Welcome & Technical Deep-Dive

9:00 AM: Welcome & opening remarks

9:30 AM: Review technical problems

10:00 AM: Breakout groups

11:30 AM: Group discussion

12:00 PM: Lunch (Catered)

1:00 PM: Breakout groups

4:30 PM: Group discussion

5:30 PM: Developer day concludes

Evening: Optional team dinner