iPhone 4上的GPS有多准确？ [英] How accurate is the GPS on the iPhone 4?

问题描述

快速提问。 iPhone 4上的GPS有多准确？我问，因为我正在为一家公司的企业项目工作，并且其中的第2部分将处理iDevice开发，我必须确定用户的位置。我想知道GPS是否足够准确，以感知用户在房间内移动，因为用户在移动房间时必须标记房间的各个部分。

预先感谢！

PS强调它不会有太大的区别，但用户实际上最终会使用iPad而不是iPhone，并且在整个项目完成时，iPad 2很可能会出局。我不知道iPad 2是否会有更好的GPS接收器，但至少我应该使用iPad / iPhone 4 GPS接收器......

解决方案

大多数建筑物都不允许在室内接收到精确的GPS信号（如果可以接收的话）。上面的屋顶/天花板/地板太厚了。即使很多树木悬挂在建筑物上，也会降低来自GPS卫星的信号。

如果所有的房间都有非常大的没有悬垂的无障碍窗户，这是一个正确的时间，几个卫星可以在窗外观看。

在户外，显然，iPhone 4 GPS似乎非常准确。有时我可以在停放的汽车周围走动，并看到地图应用程序中的蓝色圆点跟随着我。

quick question. How accurate is the GPS on the iPhone 4? I ask because I'm working on an enterprise project for a company, and part 2 of it will deal with iDevice development where I have to determine the position of the user. I'd like to know if the GPS is accurate enough to sense the user moving within rooms because the user will have to "tag" sections of the room as they move about it.

Thanks in advance!

P.S. Pressuming that it won't make much of a difference, but the users will actually end up using the iPads, not iPhones, and more than likely the iPad 2 will be out by the time the entire project is completed. I don't know if the iPad 2 will have a better GPS receiver or not, but at the minimum I should use the iPad/iPhone 4 GPS receiver...

解决方案

Most buildings will not allow reception of an accurate set of GPS signals (if they can be received at all) indoors. The roof/ceiling/floors above are just too thick. Even a lot of trees overhanging a building will degrade the signal from the GPS satellites.

You might have a chance if all the rooms have very large unobstructed windows with no overhangs, and it's the right time of day for several satellites to be in view out that window.

Outdoors, in the clear, the iPhone 4 GPS seems to be very accurate. Sometimes I can walk around my parked car, and see the blue dot in the Maps app follow me in a circle.

这篇关于iPhone 4上的GPS有多准确？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！