Ensure longitude points are within range [-180, 180]

1 files changed, 7 insertions, 0 deletions

diff --git a/lib/address.js b/lib/address.js
index 5fa924d4..f6e5be12 100644
--- a/lib/address.js
+++ b/lib/address.js
@@ -130,6 +130,13 @@ var address = {
                 Math.sin(bearing) * Math.sin(d/R) * Math.cos(lat1),
                 Math.cos(d/R) - Math.sin(lat1) * Math.sin(lat2));
 
+            // Keep longitude in range [-180, 180]
+            if (lon2 > degreesToRadians(180)) {
+                lon2 = lon2 - degreesToRadians(360);
+            } else if (lon2 < degreesToRadians(-180)) {
+                lon2 = lon2 + degreesToRadians(360);
+            }
+
             return [radiansToDegrees(lat2), radiansToDegrees(lon2)];
         }