Editing Automotive navigation system (section)

==Technology==
[[File:1995 GPS System.jpg|right|thumb|A GPS system designed by [[Philips]] in a 1995 [[Opel Omega]] vehicle]]
The road database is a [[Vector Map|vector map]]. Street names or numbers and house numbers, as well as [[Point of interest|points of interest]] ([[waypoint]]s), are encoded as [[geographic coordinate]]s. This enables users to find a desired destination by street address or as geographic coordinates. (See [[map database management]].)

Map database formats are almost uniformly proprietary, with no industry standards for satellite navigation maps, although some companies are trying to address this with SDAL (Shared Data Access Library) and [[Navigation Data Standard]] (NDS). Map data vendors such as [[Tele Atlas]] and [[Navteq]] create the base map in a GDF ([[Geographic Data Files]]) format, but each electronics manufacturer compiles it in an optimized, usually proprietary manner. GDF is not a CD standard for car navigation systems. GDF is used and converted onto the CD-ROM in the internal format of the navigation system. CDF (CARiN Database Format) is a proprietary navigation map format created by [[Philips]].

SDAL is a proprietary map format developed by [[Navteq]], which was released [[royalty free]] in the hope that it would become an industry standard for digital navigation maps, has not been very widely adopted by the industry. Vendors who used this format include:

* [[Microsoft]]
* [[Magellan Navigation|Magellan]]
* [[Pioneer Corporation|Pioneer]]
* [[Panasonic]]
* [[Clarion (car audio)|Clarion]]
* InfoGation

===Navigation Data Standard (NDS) ===
The [[Navigation Data Standard]] (NDS) initiative, is an industry grouping of car manufacturers, navigation system suppliers and map data suppliers whose objective is the standardization of the data format used in car navigation systems, as well as allow a map update capability. The NDS effort began in 2004 and became a registered association in 2009.<ref>{{cite web|url=http://www.nds-association.org/wp-content/uploads/02_NDS-20120919-Short_History_of_NDS.pdf|title=Short History of NDS|access-date=2012-11-05|archive-url=https://web.archive.org/web/20160304084643/http://www.nds-association.org/wp-content/uploads/02_NDS-20120919-Short_History_of_NDS.pdf|archive-date=2016-03-04|url-status=dead}}</ref> Standardization would improve interoperability, specifically by allowing the same navigation maps to be used in navigation systems from 20 manufacturers.<ref>{{cite web|url=http://www.nds-association.org/partners/|title=NDS Partners, NDS Association|access-date=2015-02-13|publisher=NDS Association|url-status=dead|archive-url=https://web.archive.org/web/20150213192303/http://www.nds-association.org/partners/|archive-date=2015-02-13}}</ref> Companies involved include [[BMW]], [[Volkswagen]], [[Daimler AG|Daimler]], [[Renault]], ADIT, [[Aisin AW]], [[Alpine Electronics]], [[Navigon]], Navis-AMS, [[Robert Bosch GmbH|Bosch]], [[DENSO]], [[Mitsubishi]], [[Harman International Industries]], [[Panasonic]], Preh Car Connect formerly [[TechniSat]], PTV, [[Continental AG]], [[Clarion (car audio)|Clarion]], [[Navteq]], [http://www.navinfo.com/en/index.aspx Navinfo] {{Webarchive|url=https://web.archive.org/web/20200801115841/http://www.navinfo.com/en/index.aspx |date=2020-08-01 }}, [[TomTom]] and [[Zenrin]].

====Media====
The road database may be stored in [[Read-only memory|solid state read-only memory (ROM)]], optical media ([[CD]] or [[DVD]]), solid state [[flash memory]], magnetic media ([[hard disk]]), or a combination. A common scheme is to have a base map permanently stored in ROM that can be augmented with detailed information for a region the user is interested in. A ROM is always programmed at the factory; the other media may be preprogrammed, [[download]]ed from a [[CD]] or [[DVD]] via a [[computer]] or network connection, or directly using a [[card reader]].

Some navigation device makers provide free map updates for their customers. These updates are
often obtained from the vendor's website, which is accessed by connecting the navigation device to a PC.

===Real-time data===
{{Main|Integration of traffic data with navigation systems}}
Some systems can receive and display information on [[traffic congestion map|traffic congestion]] using either [[Traffic Message Channel|TMC]], [[Radio Data System|RDS]], or by GPRS/3G data transmission via mobile phones.

In practice, Google has updated Google Maps for Android and iOS to alert users when a faster route becomes available in 2014. This change helps integrate real-time data with information about the more distant parts of a route.<ref>{{Cite news|url=https://www.washingtonpost.com/national/health-science/how-mapping-software-gathers-and-uses-traffic-information-the-key-element-is-you/2014/02/14/693606d4-9263-11e3-b46a-5a3d0d2130da_story.html|title=How mapping software gathers and uses traffic information. The key element is you.|last=Palmer|first=Brian|date=2014-02-17|newspaper=Washington Post|url-access=subscription|access-date=2019-10-08|language=en-US|issn=0190-8286}}</ref>

===Integration and other functions===
*The color [[LCD]] screens on some automotive navigation systems can also be used to display [[television]] broadcasts or [[DVD]] [[Film|movie]]s.
* A few systems integrate (or communicate) with [[mobile phone]]s for [[hands-free]] talking and [[SMS|SMS messaging]] (i.e., using [[Bluetooth]] or [[Wi-Fi]]).
* Automotive navigation systems can include [[personal information management]] for [[meeting]]s, which can be combined with a traffic and public transport information system.

===Original factory equipment===
Many vehicle manufacturers offer a [[satellite navigation device]] as an option in their vehicles. Customers whose vehicles did not ship with GNSS can therefore purchase and [[retrofit]] the original factory-supplied GNSS unit. In some cases this can be a straightforward "plug-and-play" installation if the required wiring harness is already present in the vehicle. However, with some manufacturers, new wiring is required, making the installation more complex.

The primary benefit of this approach is an integrated and factory-standard installation. Many original systems also contain a [[gyrocompass]] and/or an [[accelerometer]] and may accept input from the vehicle's [[wheel speed sensor|speed sensors]] and reverse gear engagement signal output, thereby allowing them to navigate via [[dead reckoning]] when a GPS signal is temporarily unavailable.<ref>''In-Car Positioning and Navigation Technologies—A Survey'', I. Skog, and P. Händel, [https://dx.doi.org/10.1109/TITS.2008.2011712]</ref>  However, the costs can be considerably higher than other options.

===SMS===
Establishing [[points of interest]] in real-time and transmitting them via [[GSM]] cellular telephone networks using the [[SMS|Short Message Service]] ([[SMS]]) is referred to as Gps2sms. Some vehicles and vessels are equipped with hardware that is able to automatically send an [[SMS]] text message when a particular event happens, such as theft, [[anchor]] drift or breakdown. The receiving party (e.g., a [[tow truck]]) can store the [[waypoint]] in a computer system, draw a map indicating the location, or see it in an automotive navigation system.