Good piece in Cisco blog on the topic. Obvious yes, but the following discussion of why and how are very useful for retail applications. By Jagdish Girimaji.
" .. Since the earliest maps, location accuracy has always been important. Just one degree off on the high seas and the seafaring navigator could be landing in Cuba instead of Florida. As we progress from GPS to indoor location, the quality of location accuracy is no less critical. To define the quality of location, we really need to understand the variables that influence location. This is especially true with mobile devices in the mix.
Quality of location accuracy has three dimensions:
Location precision
Refresh rate
System latency ... "
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