gpr-sidl-inv/LICENSE-COMMERCIAL.md

# Commercial License for GPR-SIDL-inv.

This software is dual-licensed:

- Under the terms of the [GNU General Public License v3 (GPL-3.0)](https://www.gnu.org/licenses/gpl-3.0.html) for open-source use.
- Under the **Commercial License** for proprietary or commercial use.

## Commercial Usage

If you intend to use this software as part of a commercial product, service, or distribution and cannot comply with the terms of the GPL v3 (e.g., you do not wish to disclose your own source code), you must obtain a commercial license.

## How to Obtain a Commercial License

Please contact the project maintainers via:

📧 Email: sunhuaifeng@email.sdu.edu.cn  

📍 Organization: State Key Laboratory for Tunnel Engineering, Institute of Geotechnical and Underground Engineering, Department of Engineering Software, Shandong University, 17923, Jingshi Road, Jinan, Shandong, China, 250061.

We will provide you with details of pricing, terms, and support options.

## Summary

| License Type     | Use Case                                | Notes                            |
|------------------|------------------------------------------|----------------------------------|
| GPL v3           | Academic, non-commercial open-source use | Must open source derivative work |
| Commercial License | Proprietary or commercial use           | Source code disclosure not required |