diff --git a/source/Ox/js/Geo.js b/source/Ox/js/Geo.js
index 283391c0..2c6b3cda 100644
--- a/source/Ox/js/Geo.js
+++ b/source/Ox/js/Geo.js
@@ -62,6 +62,21 @@
             * Math.abs(pointA.lng - pointB.lng);
     };
 
+    /*@
+    Ox.getAverageBearing <f> Returns the average of two bearings
+        > Ox.getAverageBearing(0, 90)
+        45
+        > Ox.getAverageBearing(10, 350)
+        0
+    @*/
+    // FIXME: find the proper name of this operation
+    // FIMXE: use in manhattan grid example
+    Ox.getAverageBearing = function(bearingA, bearingB) {
+        return Ox.mod((bearingA + bearingB) / 2 + (
+            Math.abs(bearingA - bearingB) > 180 ? 180 : 0
+        ), 360);
+    };
+
     /*@
     Ox.getBearing <f> Returns the bearing from one point to another
         > Ox.getBearing({lat: -45, lng: 0}, {lat: 45, lng: 0})
@@ -80,6 +95,12 @@
         return (Ox.deg(Math.atan2(y, x)) + 360) % 360;
     };
 
+    // FIXME: name, docs
+    Ox.getBearingDifference = function(bearingA, bearingB) {
+        var difference = Math.abs(bearingA - bearingB);
+        return difference > 180 ? 360 - difference : difference;
+    };
+
     /*@
     Ox.getCenter <f> Returns the center of a recangle on a spehre
         > Ox.getCenter({lat: -45, lng: -90}, {lat: 45, lng: 90})
@@ -115,6 +136,14 @@
         });
     };
 
+    // FIXME: name, docs
+    Ox.getClosestBearing = function(bearing, bearings) {
+        var differences = bearings.map(function(bearing_) {
+            return getBearingDifference(bearing, bearing_);
+        });
+        return bearings[differences.indexOf(Ox.min(differences))];
+    };
+
     /*@
     Ox.getDegreesPerMeter <f> Returns degrees per meter at a given latitude
         > 360 / Ox.getDegreesPerMeter(0)