Different Measures of Location

I stumbled on a couple of slides of Chris Heathcote on location, its measures and its usefulness. He says that instead of throwing technology at the problem we should match the needs to methods for the developper and the user (appreciate the toolbox). There are different measures of location:

• accuracy
• availability
• reliability/trust
• output useful to humans
• output useful to computers
• acquire or refine?

In each of this category, what is good enough, useful and useable by the users?

He advocates for the use of technology for quick rough location and then the use of people to refine. How accurate the positioning should be to be useful, especially when humans can read/recognise 50-100m.