Thanks for bringing up this topic. I’ve been wondering if we need to change anything about how we’re representing the Navajo Nation, which is divided into agencies and further subdivided into chapters. Agencies and chapters are both geographic and governmental units. Confounding matters, the Navajo Nation has designated the CDP boundaries to serve as chapter boundaries. The agencies are currently tagged as boundary=administrative admin_level=7, while the chapters are represented only by place nodes; some CDPs have boundary=census relations as well. It seems counterintuitive that, of the Navajo Nation’s three tiers of administrative units, only the middle one would be tagged as “administrative” in OSM.
