updated README

README.md

@@ -1,8 +1,8 @@
 Locate
-===========
+======
 
 With Locate you can easily access a visitors geolocation if his browser supports this feature.
-The basic geolocation API is a bit complicated (check http://www.w3.org/TR/geolocation-API/ for more info) in my oppinion.
+The basic geolocation API is a bit complicated (check [W3C Geolocation API Specification](http://www.w3.org/TR/geolocation-API/) for more info) in my oppinion.
 I hope I can make it easier to handle with all the data by using this little MooTools class.
 There are so many possibilities by using location based information in your webapp.
 
@@ -21,17 +21,17 @@ Use Code like this:
 	#JS
 	var location = new Locate({
 		onLocate: function(position){
-			// Do stuff with the data position.lat and position.long
+			// Do stuff with the position data
 		}
 	});
 
-Want to frequently get the position (watch you visitor move)? 
+Want to frequently get the position (watch your visitor move)? 
 
 	#JS
 	var location = new Locate({
 		loiType: 'watch',
 		onLocate: function(position){
-			// Do stuff with the data position.lat and position.long
+			// Do stuff with the position data
 		}
 	});
 
@@ -44,4 +44,20 @@ Don't want to locate directly on initializing the Class? No problem!
 
 	// start locating later in your code using this line
 	// you can also use location.watcher();
-	location.locate();
+	location.locate();
+
+position data
+-------------
+
+The position data given with the event 'locate' looks like this:
+
+* position.latitude
+* position.longitude
+* position.altitude
+  - null if not supported, meters above the WGS84 ellipsoid
+* position.accuracy
+  - specified in meters
+* position.heading
+  - null if not supported, specified in degrees counting clockwise to true north
+* position.speed
+  - null if not supported, specified in meters per second