Re: Navigation for the blind (algorithm of redirection)
No one has solved these problems. If you do, you'll be the first. These problems are why we don't just all grab Siri or whatever and have at it.
When you do this for a car, you can easily just say the radius is like 100 meters which is what the car GPS probably does, then trust the sighted driver to correct by looking for the right street sign. You can also use the fact that cars move in predictable patterns and with relatively predictable velocities to figure out when they're going to hit the next point. But you haven't even started talking about GPS accuracy yet, which is usually much too bad for fine detail when walking. 5 meters is the best case. 20 meters is what I've seen on average, with the occasional spike to 50 or 100. Your app is basically always going to start directing people into the middle of the road at some point, and you can't work around it.
Put another way: there's a reason Blindsquare doesn't do a hell of a lot more than it does.
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