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Google Maps is a mapping mobile app developed by Google for the Android and iOS operating systems; it uses Google Maps for its information. It was first released for Android on September 23, 2008, and later for iOS on December 13, 2012 as an alternative to Apple Maps, which was released with iOS 6. ==Background== On November 28, 2007, Google Maps for Mobile 2.0 was released. Its location service can work with or without a GPS receiver. The "my location" feature uses the GPS / Assisted GPS location of the mobile device, if available, supplemented by determining the nearest wireless networks and cell sites. The software looks up the location of the cell site using a database of known wireless networks and sites. By triangulating the different signal strengths from different cell transmitters and then using their location property (retrieved from the online cell site database), My Location determines the user's current location. Wireless network location method is calculated by discovering the nearby WiFi hotspots and using their location property (retrieved from the online WiFi database, in the same way as the cell site database) to further discover the user's location. The order in which these take precedence is: * GPS-based services * WLAN-, WiFi-based services * Cell transmitter-based services The software plots the streets in blue that are available with a yellow icon and a green circle around the estimated range of the cell site based on the transmitter's rated power (among other variables). The estimate is refined using the strength of the cell phone signal to estimate how close to the cell site the mobile device is. , this service was available for the following platforms: *Android *iOS *PlayStation Vita system software *Windows Mobile *Symbian OS *BlackBerry OS *Palm OS *Palm webOS Up until iOS 6, the built-in maps application on iOS was powered by Google Maps. However, with the release of the first iOS 6 beta in June 2012, Apple announced that they had created their own map service. On September 19, 2012, iOS 6 was released with a new maps application with map data powered by Apple. After Apple's built-in maps application received much criticism, Google decided to create its own maps application. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Google Maps (mobile application)」の詳細全文を読む スポンサード リンク
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