TomTom uses a proprietary mapping format , says Coast . About half a million users are embracing crowdsourced versions of digital maps . OpenStreetMap offers maps that can be customized and loaded to GPS devices . The map is updated every few minutes, so you never know what the next update will look like. Developers are creating iPhone applications based on these maps .
About half a million users are embracing crowdsourced versions of digital maps . OpenStreetMap offers maps that can be customized and loaded to GPS devices . The map is updated every few minutes, so you never know what the next update will look like. Developers are creating iPhone applications based on these maps .