On Thursday I listened to a segment of All Things Considered about the accuracy of cellphone 911 location. They want to reduce the error from 100 m to 50 m and provide vertical location in case the caller is in an apartment. I don't know how they plan to do that, since floors are usually 2.5 to 3 m apart. All the distances were given in metric, though some were compared to football fields or hallways.
Pierre -- .i toljundi do .ibabo mi'afra tu'a do .ibabo damba do .ibabo do jinga .icu'u la ma'atman.