86eTrex Vista CAppendixDownloading MapSourceMap DataGarmin MapSourceCD-ROM’s offer a variety of detailed mappingdata and navigation information.MapSource is also an excellent mediumfor storage and safety backup of PersonalWaypoints, Routes and Saved Tracks.See your Garmin Dealer or visit theGarmin web site at www.garmin.comfor information on which maps work with theeTrex Vista C.Garmin MapSourceU.S. Topo 24KDigital Elevation Models(DEM) Mapsprovide elevation dataat any point identified by thePanning ArrowTransferring MapSource Map DataIf you have purchased a Garmin MapSource CD-ROM mapping programyou may want to transfer detailed map data before beginning use to provideyour unit with maximum Find features and mapping capability. The eTrexVista C accepts up to 24 MB of map data from most MapSource products. Itis not possible to transfer 3rd party maps into Garmin products.You cannot view multiple types of MapSource data in the same loca-tion at the same time (one displays over the other). When you leave aMetroGuide area for example and enter the area of a topographic map,the display will change to contour lines. The same is true when movingfrom a topo map to a MetroGuide map.Maps that are at the top of the hierarchy and displays over any othermap information. Because new maps are constantly being released, consultyour Garmin Dealer or the Garmin website to determine the order ofhierarchy.Map data transfer requires the use of a PC, a Garmin MapSourceCD-ROM, and the Universal Service Bus (USB) cable supplied with thisunit. Follow detailed instructions for data transfer in the MapSourceUser’s Manual. Note that downloading maps overwrites any maps alreadydownloaded to the unit. This includes the Marine Points of Interest data-base provided with the eTrex Vista C.It is also important to note that certain features contained in the eTrexVista C are not enabled unless you are using mapping data they aredesigned to support, such as many of the Find Features and DEM Eleva-tion Profiles. Visit the Garmin website for details on all of the maps youcan use with the eTrex Vista C.