From 819ddd0e192be5225d9135fd218bacb478f9e154 Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Fri, 26 Jan 2018 09:39:25 +0100
Subject: [PATCH] Set enableHighAccuracy in geolocation example

---
 examples/geolocation.js | 4 ++++
 src/ol/Geolocation.js   | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/examples/geolocation.js b/examples/geolocation.js
index 235a70cd27..f048913a60 100644
--- a/examples/geolocation.js
+++ b/examples/geolocation.js
@@ -34,6 +34,10 @@ const map = new Map({
 });
 
 const geolocation = new Geolocation({
+  // enableHighAccuracy must be set to true to have the heading value.
+  trackingOptions: {
+    enableHighAccuracy: true
+  },
   projection: view.getProjection()
 });
 
diff --git a/src/ol/Geolocation.js b/src/ol/Geolocation.js
index baadde09dd..4b4cea52c7 100644
--- a/src/ol/Geolocation.js
+++ b/src/ol/Geolocation.js
@@ -246,6 +246,8 @@ Geolocation.prototype.getAltitudeAccuracy = function() {
 
 /**
  * Get the heading as radians clockwise from North.
+ * Note: depending on the browser, the heading is only defined if the `enableHighAccuracy`
+ * is set to `true` in the tracking options.
  * @return {number|undefined} The heading of the device in radians from north.
  * @observable
  * @api