“Metros” refer to urban areas of population more than five million; boom towns: 2.5-5 million; niche cities: 1-2.5 million; other urban towns: less than one million; “developed rural” includes districts such as Bathinda (Punjab) and Kangra (Himachal Pradesh); “emerging rural”: Latur (Maharashtra), Kamrup (Assam), etc.; “underdeveloped rural”: Kalahandi (Odisha), Bastar (Chhattisgarh), etc.