diff --git a/README.md b/README.md
index cd4f21e..a3f0d3a 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,6 @@ source env/bin/activate
 # Install dependencies
 pip install -r requirements.txt
 ```
+
+## Notes
+- Lon,Lat should be used throughout the codebase. (i.e. x,y)