You don't have a route map of the area loaded into your Edge 705. You either need to buy the route map from Garmin (expensive, and they nag you to update within a year; on optical disk or microSD card), or free from OpenStreetMap (garmin.openstreetmap.nl). Maps are pretty compact as long as you don't download tiles for the whole world into your GPS: the built-in memory should have more than enough capacity to handle a couple dozen map tiles.