definition
strict definition
street group
The geographic tier for named thoroughfares, allowing buildings and addresses to be associated with their streets.
The street group holds named thoroughfares so that buildings and addresses can be linked to them. It sits in the region hierarchy for that reason and not because a street is governed.
A street has no population and no area in the sense the other tiers have. What identifies it is its name together with the municipality it runs through, since one name can repeat many times in a country and one street can cross several municipalities.
The street is a named route rather than a governed territorial area. Its course and municipality distinguish it from another thoroughfare with the same name.