One of the four development indexes that a colony can specialize in.

Colonies with high Urban Centralization focus on urban densification and on growth of the population. Too little urban zoning will result in a rural colony which will not attract many immigrants.

Facility research at urban colonies benefits from the practical experimentation possible in these environments

Like all development indexes, extreme specialization of one index over the others can produce serious side effects that can impact the colony's health and sustainability requiring more investment in other remedies such as more facilities or differing governments.