The phrase "metre radius" refers to a specific distance measurement. It means that the distance being described has a length of one meter in all directions from a central point. Full definition
The hotel does not have parking however there are three public car parks located within a 200 metre radius of the hotel. (sydneyhotelsaccommodation.com)
The tool can correctly place a user within a 100 - metre radius with up to 85 per cent accuracy. (newscientist.com)
But crucially, it also enables one person to contact another within a 10 metre radius without knowing their phone number. (onlinepersonalswatch.com)