90GPSmap 76CSAppendixDownloading 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 the Garminweb site at: www.garmin.comfor information on which maps work with theGPSmap 76CS.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 mappingprogram you may want to transfer detailed map data before beginninguse, to provide your unit with maximum Find features and mappingcapability. The GPSmap 76CS accepts up to 115 MB of map data frommost MapSource products. It is not possible to transfer 3rd party mapsinto 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 aCity Select area for example and enter the area of a topographic map, thedisplay will change to contour lines. The same is true when moving froma topo map to a City Select map.Maps that are at the top of the hierarchy display over any other mapinformation. 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 MapSource CD-ROM, and the Universal Service Bus (USB) cable supplied with this unit.When downloading new maps, those already downloaded are overwritten.Include maps you want to retain by adding them to your new map down-load. Follow instructions for map transfer in the MapSource User’s Manual.It is also important to note, that certain features contained in theGPSmap 76CS will not be enabled unless you are using mapping datathey are designed to support, such as many of the Find Features andDEM Elevation Profiles. Visit the Garmin website for details on all of themaps for use with the GPSmap 76CS.