Space-Time

Imagine a geolocation solution with a claimed accuracy of 1 metre, but which delivers its location ‘fix’ 10 seconds late.  Based upon a person walking at the generally-accepted preferred walking speed (1.4 metres per second), they could be 15 metres or more away from their reported location, in any direction, by the time their position is reported.  This represents an area of over 700 square metres within which the person could be located, by the time their location is reported.  This is equivalent to an area of three tennis courts or roughly half the size of a professional ice hockey pitch – not quite the 1 metre accuracy originally envisaged…

So a claimed accuracy of 1 metre only works, if the location is reported essentially in real-time. In other words, for a location system to be truly effective, it needs to locate in 4-dimensional space-time and not just in 3-dimensional space.  It needs to be both accurate and fast.