### Purpose
To stimulate creativity and complex problem-solving, **five hackathons** will be held as part of the  
**[OpenGeoHub Summer School 2025](https://opengeohub.org/summer-school/summer-school-2025/) —  
“Data Science for Earth Observation: Hands-on Training in Python, R and Julia.”**

All participants must complete **at least one (1) hackathon** to receive a Summer School certificate.  

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### Eligibility
- **Only registered Summer School participants** are eligible.  
- The OpenGeoHub organizing committee will verify that all submissions come from registered participants.

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### Teams
- Teams may consist of **1–2 participants**.  
- **Team names must include the participant names**.

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### Deliverables
- A **computational notebook** showing all (or the majority of) steps used to generate your submission.  
- The notebook must be submitted together with your model predictions for this hackathon.

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### Deadline
- **Submission deadline:** **Thursday, 4 September 2025, 24:00 (Europe/Amsterdam)**  
  *(equivalent to 00:00 on Friday, 5 September 2025)*.  
- Late submissions will **not** be accepted.

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### Availability of Hackathons
- Not all lectures/blocks come with a hackathon.  
- To check which hackathons are available, see **Mattermost**.

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### Prizes (best-performing teams)
- **1×** Waived registration fee for **OpenGeoHub Summer School 2026** (to be announced).  
- **1×** LeanPub coupon for books valued at **€350**.