New-Aquitaine: Basins of life 2015

The basin of life is the smallest area in which people have access to the most common facilities and services. Its contours are defined in several stages. First, a service hub is defined as an urban municipality or unit with at least 16 of the 31 intermediate facilities. The areas of influence of each service hub are then demarcated by grouping the nearest municipalities, the proximity being measured in travel time, by road at hollow time. Thus, for each municipality and for each equipment not present in the municipality, the nearest municipality offering this equipment is determined. Intermediate equipment as well as local equipment are taken into account. Its main interest is to describe unpopulated spaces, i.e. living basins built on urban units of less than 50,000 inhabitants.