Updated readme

README.md

@@ -32,7 +32,7 @@ Tile38 is an open source (MIT licensed), in-memory geolocation data store, spati
 - Full [command line interface](#cli).
 - Leader / follower [replication](#replication).
 - In-memory database that persists on disk.
-- All coordinates are in [WGS 84 Web Mercator / EPSG:3857](#coordinate-system)
+- Uses WGS84 coordinate system
 
 ## Components
 - `tile38-server    ` - The server
@@ -95,12 +95,6 @@ $ ./tile38-cli
 > help
 ```
 
-## Coordinate System
-It's important to note that the coordinate system Tile38 uses is 
-[WGS 84 Web Mercator](https://en.wikipedia.org/wiki/Web_Mercator), also known 
-as EPSG:3857. All distance are in meters and all calculations are done on a spherical surface, 
-not a plane.
-
 ## <a name="cli"></a>Playing with Tile38
 
 Basic operations: