From 9efc9a24e1f62f69f89b28d16c8da76587a75818 Mon Sep 17 00:00:00 2001
From: Tom Lee <thomas.j.lee@gmail.com>
Date: Tue, 1 Jul 2025 15:59:19 -0400
Subject: [PATCH] add license note to address concerns in #2723

---
 README.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/README.md b/README.md
index 3f63130d3e..8f7f82a660 100644
--- a/README.md
+++ b/README.md
@@ -67,3 +67,9 @@ Support this project by becoming a sponsor. Your logo will show up here with a l
 <a href="https://opencollective.com/turf/sponsor/7/website" target="_blank"><img src="https://opencollective.com/turf/sponsor/7/avatar.svg"></a>
 <a href="https://opencollective.com/turf/sponsor/8/website" target="_blank"><img src="https://opencollective.com/turf/sponsor/8/avatar.svg"></a>
 <a href="https://opencollective.com/turf/sponsor/9/website" target="_blank"><img src="https://opencollective.com/turf/sponsor/9/avatar.svg"></a>
+
+## License
+
+Turf is distributed under the [MIT license](LICENSE).
+
+Turf uses an unmodified version of MarchingSquaresJS.  MarchingSquaresJS's license has an exception to the GNU Affero General Public License for unmodified versions.  This exception allows distribution of unmodified versions of MarchSquaresJS under any license as long as [its license notice](https://github.com/RaumZeit/MarchingSquares.js/blob/master/LICENSE.md) is included.
\ No newline at end of file