Nokia E90 User Guide - Page 53

14. Global Positioning System (GPS) Select > GPS. The Global Positioning System (GPS) is a worldwide radio navigation system that includes 24 satellites and their ground stations that monitor the operation of the satellites. A GPS terminal, such as the GPS receiver in the Nokia E90 Communicator, receives low-power radio signals from the satellites, and measures the travel time of the signals. From the travel time, the GPS receiver can calculate its location to the accuracy of meters. Coordinates are expressed in degrees and decimal degrees format using the WGS-84 coordinate system. The Global Positioning System (GPS) is operated by the government of the United States, which is solely responsible for its accuracy and maintenance. The accuracy of location data can be affected by adjustments to GPS satellites made by the United States government and is subject to change with the United States Department of Defense civil GPS policy and the Federal Radionavigation Plan. Accuracy can also be affected by poor satellite geometry. Availability and quality of GPS signals may be affected by your location, buildings, natural obstacles, and weather conditions. The GPS receiver should only be used outdoors to allow reception of GPS signals. GPS should only be used as a navigation aid. It should not be used for precise location measurement and you should never rely solely on location data from the GPS receiver for positioning or navigation. The trip meter has limited accuracy, and rounding errors may occur. Accuracy can also be affected by availability and quality of GPS signals. Nokia Maps Select > GPS > Maps. With Maps, you can see your current location on the map, browse maps for different cities and countries, search for addresses and different points of interest, plan routes from one location to another, and save locations as landmarks and send them to compatible devices. You can also purchase extra services, such as guides and a turn-by-turn navigation service with voice guidance. When you use Maps for the first time, you may need to define an internet access point for downloading map information for your current location. To change the default access point later, select Options > Settings > Network > Default access point. Almost all digital cartography is inaccurate and incomplete to some extent. Never rely solely on the cartography provided for use in this device. Download maps When you browse the map on the display, for example, move to another country, a new map is downloaded automatically. These downloaded maps are free of charge, but downloading may involve the transmission of large amounts of data through your service provider's network. For more information on data transmission charges, contact your service provider. You can view the amount of transferred data from the data counter (kB) shown on the display. The counter shows the amount of network traffic when you browse maps, create routes, or search for locations online. To prevent the device from automatically downloading maps through the internet, for example, when you are outside your home cellular network, select Options > Settings > Network > Use network > Off. To receive a note when your device registers to a network outside your home cellular network, select Options > Settings > Network > Roaming warning > On. To adjust the size of the cache that is used for saving maps or voice guidance files, select Options > Settings > Network > Max. memory card use (%). This option is available only when a compatible memory card is inserted. When the memory is full, the oldest map data is deleted. The cache cannot be emptied. Nokia Map Loader Nokia Map Loader is PC software that you can use to download and install maps for different countries from the internet to your device or a compatible memory card (if inserted). You can also use it to download voice files for turn-by-turn navigation. To use Nokia Map Loader, you must first install it to a compatible PC. You can download the PC software from the internet at www.nokia.com/maps. You must use Nokia Maps before using Nokia Map Loader. Nokia Map Loader uses the Maps history information to check the version of map data to be downloaded. After you have installed the PC software to your PC, to download maps, do the following: 1. Connect your device to the PC by using a compatible USB data cable. 2. Open Nokia Map Loader on your PC. Nokia Map Loader checks the version of map data to be downloaded. © 2007 Nokia. All rights reserved. 53