altitude offset tip

OsmAnd/res/values/strings.xml

@@ -9,6 +9,13 @@
          1. All your modified/created strings are in the top of the file (to make easier find what\'s translated).
     PLEASE: Have a look at http://code.google.com/p/osmand/wiki/UIConsistency, it may really improve your and our work  :-)  Thx - Hardy
     -->
+	<string name="tip_altitude_offset">Altitude Display - Offset Correction</string>
+	<string name="tip_altitude_offset_t">\tThe altitude reported by most GPS devices is stated in the ellipsoid-based WGS84 reference system and requires a position-dependent correction for the conversion to local reference systems.
+		\n\tA better approximation to these local systems is the EGM96 reference. OsmAnd now also supports the automatic display of altitudes in the EGM96 system.
+		\n\tIn order to achieve this, simply download this file:
+		\n\thttp://earth-info.nga.mil/GandG/wgs84/gravitymod/egm96/binary/WW15MGH.DAC
+		\n\t\and place it in the osmand folder (usually on you SD card)
+	</string>
     <string name="map_widget_max_speed">Speed limit</string>
     <string name="route_descr_lat_lon">Lat %1$.3f, lon %2$.3f</string>
     <string name="route_descr_current_location">Current position</string>

OsmAnd/src/net/osmand/plus/activities/TipsAndTricksActivity.java

@@ -28,6 +28,7 @@ public class TipsAndTricksActivity {
 			{R.string.tip_select_destination_point,R.string.tip_select_destination_point_t},
 			{R.string.tip_navigation,R.string.tip_navigation_t},
 			{R.string.tip_app_mode,R.string.tip_app_mode_t_v2},
+			{R.string.tip_altitude_offset,R.string.tip_altitude_offset_t},
 			{R.string.tip_recent_changes,R.string.tip_recent_changes_0_8_3_t},
 			{R.string.tip_recent_changes,R.string.tip_recent_changes_0_8_2_t},
 			{R.string.tip_map_switch,R.string.tip_map_switch_t_v2},