q (Backspace): Select the backspace screen buttonif an incorrect character has been selected.To make name selections easier, the system will onlyhighlight the characters that can follow the last oneentered. For example, if a Z is entered, a T may not beavailable for selection.If a name does not display after entry, it may need to beentered differently, the map DVD disc may not containthat information, or the correct search area has not beenselected. See Database Coverage Explanations onpage 2-40 for more information or Destination onpage 2-14 to change the search area.MapsThis section includes basic information needed to knowabout the map database.The maps are stored on a DVD. The 48 contiguousUnited States and portions of Canada are containedon one disc.Detailed AreasRoad network attributes are contained in the mapdatabase for detailed areas. Attributes includeinformation such as street names, street address, turnrestrictions, etc. A detailed area will include all majorhighways, service roads, and residential roads. Thedetailed areas include points of interest (POI) such as:restaurants, airports, banks, hospitals, police stations,gas stations, tourist attractions, historical monuments,etc. The map database may not include data for newlyconstructed areas or map database corrections that arecompleted after the production of the disc. The navigationsystem will provide full route guidance in the detailed mapareas.Limited Guidance AreasAny area that is not classified as detailed is a limitedguidance area. Limited guidance streets will bedisplayed on the map display but route guidance maynot be given on these streets. Some POI categories,such as the city center POI category, and some streetaddresses are included in the limited guidance areas.The navigation system will inform you by voice promptswhen you are traveling into a limited guidance area whereroute guidance will not be available. The street maps andthe directional arrow displayed on the navigation systemcan then be used to determine the remaining route toyour destination.2-4