due to the fact that loss of details may lead to user confusion the factors can also include characteristics of the specified starting location ending location and waypoint location s a significant percentage of all directions requested on a typical on line mapping service have an extended entity for the starting location or the ending location an extended entity can be defined as data or an identifier used to identify a geographical region and which is commonly known and or readily ascertainable such as a zip code or city name however it is unlikely that the user wants to start or end a route at the centroid of an extended entity in that the centroid could be at an unfamiliar location associated with that region instead it is more likely that the user is familiar with the region and chooses that input as a short cut and then ignore part of the directions the presence of such an extended entity as a starting or ending location is a clue to the system that abbreviation around the extended entity is more suitable than a traditional route to the centroid of such an object note that the definition of an extended entity can vary across a region and culture these factors and potentially other factors can be used separately or together to determine if an abbreviated direction set will be generated and whether the abbreviated set is to be shown as the default presentation in the case where a default presentation is warranted a determination is made as to which part of the route will be abbreviated in a specific implementation the generation of abbreviated direction s can be.