Determine whether a MEGA country needs subnational data, choose the supported administrative granularity, and align boundaries, population, BOOST geography, poverty, human-development, and dashboard joins. Use when a workbook contains regional or local fields; admin0, admin1, admin2, geo0, or geo1 semantics are unclear; sources use different boundary vintages or levels; maps have unmatched names or missing regions; or subnational indicators must be added to mega-indicators and the country dashboard.
