diff --git a/docs/getting-started/troubleshooting.md b/docs/getting-started/troubleshooting.md
old mode 100644
new mode 100755
index d3ad889f7a..f58b812098
--- a/docs/getting-started/troubleshooting.md
+++ b/docs/getting-started/troubleshooting.md
@@ -180,31 +180,3 @@ Here you see "intel-minnow" but common values are:
 
 More HAL can be found on Gerrit (search projects named as 4a-hal*)
 
-## Installing the Map for the Navigation Application
-
-While the Navigation App is installed with all other demo Apps at first boot, the Maps required to be installed manually.
-
-### a) Method 1 on target download
-
- 1. Install the new image on the target
- 2. boot a first time to install the demo Apps
- 3. via ssh or serial connection, execute the script
-    * /usr/AGL/apps/download_mapdata_uk.sh\
-    or
-    * /usr/AGL/apps/download_mapdata_jp.sh
-
-### b) At image creation
-
-Download on your build machine the desired maps and uncompress them on your target image before 1st boot.
-This method is quicker and does not require to have the network enabled on the target device.
-Map can be found here.
-
-* <http://agl.wismobi.com/data/japan_TR9/navi_data.tar.gz>
-* <http://agl.wismobi.com/data/UnitedKingdom_TR9/navi_data_UK.tar.gz>
-
-Once that you have built your image on the SD card, uncompress the desired map in on the SD card at the position /YourMountPoint/var/mapdata\
-(YourMountPoint will vary with your build system).
-
-You can also use the script from the image to install the Mapdata on your SD card but there is little adavange in using that method. e.g.
-
-* download_mapdata_jp.sh /YourMountPoint
diff --git a/docs/ref-app/ref-apps.md b/docs/ref-app/ref-apps.md
new file mode 100755
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+++ b/docs/ref-app/ref-apps.md
@@ -0,0 +1,66 @@
+# How to use the AGL reference application
+
+---
+## Navigation
+
+**Navigation app uses mapbox as a provider of map.  You need to create an account on mapbox and get own access token.**
+
+Signup page :
+
+https://www.mapbox.com/signup/
+
+
+### How to set the access token
+
+**There are two ways to set the access token.**
+
+#### Set in build time
+
+Add your access token to localconf before building AGL.
+
+```
+MAPBOX_ACCESS_TOKEN = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+```
+
+
+#### Set in run time
+
+When you did not configure localconf before building AGL, /etc/naviconfig.ini in target rootfs is as follows.
+
+```
+{
+	"mapAccessToken":"Please set mapbox access token",
+	"speed":60,
+	"interval":100,
+	"latitude":36.1363,
+	"longitute":-115.151,
+	"mapStyleUrls":"mapbox://styles/mapbox/dark-v9"
+}
+```
+
+Please set your access token to mapAccessToken.
+
+### How to use navigation
+
+Connect wifi or ether before launching navigation from homescreen.
+
+
+
+
+---
+
+## POI app
+
+**POI app uses yelp as a provider of poi.  You need to create an developer account on yelp and get own appID.**
+
+yelp developer page :
+
+https://www.yelp.com/developers
+
+TBD.
+
+
+---
+
+
+