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Firefox OS/Geolocation: Difference between revisions
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==Details== | ==Details== | ||
The geolocation provider use a few different method to compute location based on the environment: | The geolocation provider use a few different method to compute location based on the environment: | ||
#Satellite - Uses GPS Receiver to locate the device. | |||
#Network methods - Uses nearby WiFi Access points and Cell towers | |||
These two methods complement each other to improve geolocation | These two methods complement each other to improve geolocation | ||
Availability: GPS works well in open sky, where Network methods are not as accurate. Network methods work well in deep indoor, where GPS does not work well. Having both increases availability. | Availability: GPS works well in open sky, where Network methods are not as accurate. Network methods work well in deep indoor, where GPS does not work well. Having both increases availability. | ||
Time To First Fix: GPS is accurate, and take some time, while Network is coarse and is faster. Network location can be used by GPS to opti | #Time To First Fix: GPS is accurate, and take some time, while Network is coarse and is faster. Network location can be used by GPS to opti | ||
===AGPS=== | ===AGPS=== | ||
For the Satellite fixes, GPS is used. To shorten the searching for satellites, methods for assistance are used. Some of them are: | For the Satellite fixes, GPS is used. To shorten the searching for satellites, methods for assistance are used. Some of them are: | ||
# SUPL: Standardized | |||
# Proprietary Extended Ephemeris solutions: GPS HW providers implement optimizations. | |||
So, to recap – Mozilla does not ship binaries. Mozilla does not configure Modems. If you are shipping devices, you must ensure that a-gps is configured properly with the HW provider. Configuration of a-gps is completely outside of the scope of Firefox OS. | So, to recap – Mozilla does not ship binaries. Mozilla does not configure Modems. If you are shipping devices, you must ensure that a-gps is configured properly with the HW provider. Configuration of a-gps is completely outside of the scope of Firefox OS. | ||