Expand / It is pretty difficult getting line-of-sight to many GPS satellites there.
Obtaining a good GPS place in a town could be hard thanks to all of the tall buildings. Skyscrapers reveal the GPS signal and are able to make your place data go mad, but Google says it could fix for this and provide users a far more exact site. Google is using Google Maps’ 3D construction data to compute how buildings hinder GPS, also it states Android’s brand new”3D mapping helped corrections module” could adjust for GPS bounces.
A fast refresher about how GPS works: the place is triangulated by monkeys in space. Even the GPS time stamp informs the telephone just how long the signal took to reach {} distance, after which you simply multiply by the rate of light to receive your distance away from the satellite. If you receive a sign such as this from multiple satellites, then you can limit your place on Earth into some few toes.
Each these fancy distance calculations work good, as long as you possess a open view of the skies. GPS triangulation supposes your signs have a direct shot out of the satellite to a telephone, but that is sometimes not the situation. In a town, the giant glass-and-metal skyscrapers may signify the GPS signal in its way down out of distance. In case your GPS signal involves a ricochet, unexpectedly your”period x speed-of-light” equation does not equal your space from your satellite, then a leg in your triangulation triangle is more than it ought to be, along with your GPS coordinates are not exact anymore. In a town, this may mean that your place is unexpectedly on the incorrect side of the road –or even the incorrect block.
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