diff --git a/modules/geo/geo.js b/modules/geo/geo.js
index 318283931..7a4fe121a 100644
--- a/modules/geo/geo.js
+++ b/modules/geo/geo.js
@@ -8,6 +8,11 @@ var EQUATORIAL_RADIUS = 6356752.314245179;
 var POLAR_RADIUS = 6378137.0;
 
 
+// vector addition
+export function geoVecEquals(a, b) {
+    return (a[0] === b[0]) && (a[1] === b[1]);
+}
+
 // vector addition
 export function geoVecAdd(a, b) {
     return [ a[0] + b[0], a[1] + b[1] ];
diff --git a/modules/geo/index.js b/modules/geo/index.js
index 2a1c8fa31..95bba82c5 100644
--- a/modules/geo/index.js
+++ b/modules/geo/index.js
@@ -23,6 +23,7 @@ export { geoPolygonIntersectsPolygon } from './geo.js';
 export { geoScaleToZoom } from './geo.js';
 export { geoSphericalDistance } from './geo.js';
 export { geoVecAdd } from './geo.js';
+export { geoVecEquals } from './geo.js';
 export { geoVecFloor } from './geo.js';
 export { geoVecSubtract } from './geo.js';
 export { geoVecScale } from './geo.js';
diff --git a/test/spec/geo/geo.js b/test/spec/geo/geo.js
index c9762e051..585e7a2e7 100644
--- a/test/spec/geo/geo.js
+++ b/test/spec/geo/geo.js
@@ -1,5 +1,13 @@
 describe('iD.geo', function() {
 
+    describe('geoVecEquals', function() {
+        it('tests vectors for equality', function() {
+            expect(iD.geoVecEquals([1, 2], [1, 2])).to.be.true;
+            expect(iD.geoVecEquals([1, 2], [1, 0])).to.be.false;
+            expect(iD.geoVecEquals([1, 2], [2, 1])).to.be.false;
+        });
+    });
+
     describe('geoVecAdd', function() {
         it('adds vectors', function() {
             expect(iD.geoVecAdd([1, 2], [3, 4])).to.eql([4, 6]);