Using latitude / longitude in URL

I would like to create an API with this kind of route: /Localisations/AdressesProche/:lat/:long/:radius
It’s something that can be achieved: https://stackoverflow.com/questions/21944225/pass-decimal-as-value-in-webapi-2-url

A typical request would be a GET sent to https://my.api.mockaroo.com/Localisations/AdressesProche/46.8/-71.2/3
However, I receive this error: No API method was found with URL pattern matching “/Localisations/AdressesProche/46.8132166/-71.2281829/3”."