低功耗移动 GPS 移动地图显示需求
问题概述
在资源受限的老旧硬件上实现实时 GPS 移动地图显示，需要解决低功耗计算、有限带宽的实时数据传输以及投影误差等问题。
痛点标签
- 在低时钟频率的处理器上实现实时移动地图
- 在低带宽移动网络中传输实时 GPS 数据
- 使用粗略的三角函数近似导致定位误差但仍需优化
待验证问题
- 是否有企业或开发者在类似低功耗硬件上实现了实时移动地图？
- 用户对低带宽下的实时 GPS 数据传输有何具体需求？
- 对粗略三角函数近似的容错误差接受度是多少？
证据
原话 · @Anonymous
One of the things I discovered a while back is that even fairly crude trig approximations don't put that much error into your position, over a small enough distance. To calculate things like straight-line range from where you are now to where you need to put a unit for an emergency, you're probably not working over an area of more than a couple of hundred kilometres radius and the error will be within a few dozen metres. And once you get within about half a k, you're driving towards the column of smoke anyway ;-)
原话 · @Anonymous
real-time GPS-driven moving map display
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