How Accurate It Actually Is
Location fixes are estimates with error bars that vendors rarely show. Where the error comes from, and what it means for decisions made from the data.
Analysis
What it can and cannot measure
The dot is the centre of a probability, not a position. A gap has seven possible causes and only one of them is deliberate.
3 notes, in reading order
Geofences
A boundary that produces arrival and departure events instead of a continuous trail. The single largest reduction in collection available.
Procedure
Gaps, Dead Zones and Missing Data
A tracker that reports nothing looks identical whether the signal failed or the device was disabled. Telling them apart, and what not to assume.
Analysis