diff --git a/examples/tissot.js b/examples/tissot.js
index af92b5cb32..bde3061997 100644
--- a/examples/tissot.js
+++ b/examples/tissot.js
@@ -63,7 +63,8 @@ var radius = 800000;
 var x, y;
 for (x = -180; x < 180; x += 30) {
   for (y = -90; y < 90; y += 30) {
-    var circle4326 = ol.geom.Polygon.circular(wgs84Sphere, [x, y], radius, 64);
+    var circle4326 = ol.geom.Polygon.createCircularOnSphere(
+        wgs84Sphere, [x, y], radius, 64);
     var circle3857 = circle4326.clone().transform('EPSG:4326', 'EPSG:3857');
     vectorLayer4326.getSource().addFeature(new ol.Feature(circle4326));
     vectorLayer3857.getSource().addFeature(new ol.Feature(circle3857));
diff --git a/src/ol/geolocation.js b/src/ol/geolocation.js
index d5cf49ac84..8ccd4fb09b 100644
--- a/src/ol/geolocation.js
+++ b/src/ol/geolocation.js
@@ -169,7 +169,7 @@ ol.Geolocation.prototype.positionChange_ = function(position) {
   this.set(ol.GeolocationProperty.POSITION, projectedPosition);
   this.set(ol.GeolocationProperty.SPEED,
       goog.isNull(coords.speed) ? undefined : coords.speed);
-  var geometry = ol.geom.Polygon.circular(
+  var geometry = ol.geom.Polygon.createCircularOnSphere(
       ol.sphere.WGS84, this.position_, coords.accuracy);
   geometry.applyTransform(this.transform_);
   this.set(ol.GeolocationProperty.ACCURACY_GEOMETRY, geometry);
diff --git a/src/ol/geom/polygon.js b/src/ol/geom/polygon.js
index 52d55ff1fd..117edbc54a 100644
--- a/src/ol/geom/polygon.js
+++ b/src/ol/geom/polygon.js
@@ -351,13 +351,16 @@ ol.geom.Polygon.prototype.setFlatCoordinates =
 /**
  * Create an approximation of a circle on the surface of a sphere.
  * @param {ol.Sphere} sphere The sphere.
- * @param {ol.Coordinate} center Center.
- * @param {number} radius Radius.
- * @param {number=} opt_n Optional number of points.  Default is `32`.
- * @return {ol.geom.Polygon} Circle geometry.
+ * @param {ol.Coordinate} center Center (`[lon, lat]` in degrees).
+ * @param {number} radius The great-circle distance from the center to
+ *     the polygon vertices.
+ * @param {number=} opt_n Optional number of vertices for the resulting
+ *     polygon. Default is `32`.
+ * @return {ol.geom.Polygon} The "circular" polygon.
  * @api stable
  */
-ol.geom.Polygon.circular = function(sphere, center, radius, opt_n) {
+ol.geom.Polygon.createCircularOnSphere =
+    function(sphere, center, radius, opt_n) {
   var n = goog.isDef(opt_n) ? opt_n : 32;
   /** @type {Array.<number>} */
   var flatCoordinates = [];
diff --git a/src/ol/sphere/sphere.js b/src/ol/sphere/sphere.js
index 96a7b68c2b..7dd37905d8 100644
--- a/src/ol/sphere/sphere.js
+++ b/src/ol/sphere/sphere.js
@@ -214,12 +214,13 @@ ol.Sphere.prototype.midpoint = function(c1, c2) {
 
 
 /**
- * Returns the coordinate at the given distance and bearing from c.
+ * Returns the coordinate at the given distance and bearing from `c1`.
  *
- * @param {ol.Coordinate} c1 Coordinate.
- * @param {number} distance Distance.
- * @param {number} bearing Bearing.
- * @return {ol.Coordinate} Coordinate.
+ * @param {ol.Coordinate} c1 The origin point (`[lon, lat]` in degrees).
+ * @param {number} distance The great-circle distance between the origin
+ *     point and the target point.
+ * @param {number} bearing The bearing (in radians).
+ * @return {ol.Coordinate} The target point.
  */
 ol.Sphere.prototype.offset = function(c1, distance, bearing) {
   var lat1 = goog.math.toRadians(c1[1]);