 <p>You can pull the map into something like <a href="http://tilemill.com" rel="nofollow">TileMill</a> using <a href="https://www.mapbox.com/tilemill/docs/guides/reprojecting-geotiff/" rel="nofollow">this guide</a> to turn your image into a GeoTIFF. Since it's from a video game, it won't have real coordinates, but you can basically choose some fake coordinates for its corners and everything inside will be interpolated. You would export this map and use it with the <a href="http://mapbox.com/mapbox-ios-sdk" rel="nofollow">Mapbox iOS SDK</a>, which is an open source rewrite of MapKit but with more customizability. </p> <p>Technically you could also use the map in MapKit as an <code>MKTileOverlay</code> but it would have to be hosted online. With the above solution, you could export directly to an <a href="http://mbtiles.org" rel="nofollow">MBTiles</a> file and use it local to the app. </p>