6 License

TerraHidro is released under the GNU Lesser General Public License (LGPL), version 3 or later.
This means you may use, copy, modify, and redistribute TerraHidro—commercially or non-commercially—provided you comply with the LGPL terms.

What this permits

  • Free use and redistribution. You can distribute TerraHidro (source or binaries) and include it in your projects.
  • Modify and share improvements. If you change TerraHidro itself (the “Library”), you must license those changes under LGPL-3.0+ and keep notices intact.
  • Link in applications. You may link TerraHidro with your own Application (proprietary or open). The Application can be under a different license, as long as users retain the ability to relink/replace the TerraHidro library with a modified version.

Key obligations (summary)

  • Notices & copies. Distribute TerraHidro with a prominent notice that it uses the LGPL-licensed Library and include copies of the LGPL v3 and the GPL v3 license texts.
  • Header usage in object code. If object code from your Application includes more than trivial material from TerraHidro’s headers, you must provide the above notices and license copies.
  • Combined Works. If you ship an Application linked with TerraHidro (a Combined Work), do not restrict users from modifying the LGPL parts or from reverse-engineering solely to debug their modifications.
  • Relinking option. Provide one of the following:
    • the Minimal Corresponding Source of the LGPL components and the Corresponding Application Code sufficient to let users relink with a modified TerraHidro; or
    • use a suitable shared-library mechanism so users can drop in a compatible modified TerraHidro at runtime.
  • Installation Information (when required). If the GPL would require installation information for user products, provide it to the extent needed for users to install and run a modified TerraHidro in your Combined Work.

No warranty

TerraHidro is provided “as is,” without any warranty, including without limitation the implied warranties of merchantability or fitness for a particular purpose.

Copyright

Copyright © 2008–2025 National Institute for Space Research (INPE), Brazil.
The Free Software Foundation holds the copyright to the LGPL v3 text (2007).

For full terms, see: GNU Lesser General Public License, Version 3 (29 June 2007). TerraHidro is licensed as LGPL-3.0-or-later.

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