Briefly explain urban class group.

Urban class group

The various urban class groups are :

1. Towns
2. Urban Agglomeration (UA)
3. Out Grouths (OG)
4. Metropolitan cities
5. Mega cities
6. Boom towns and Niche cities

1. Towns

Towns are defined as places that satisfy the following criteria:

• Minimum population of 5000. 
• At least 75% of male working population engaged in non-agricultural pursuits.
• Density of population at least 400 persons per km².

2. Urban Agglomeration (UA)

• Urban agglomeration occurs when two or more adjacent urban areas agglomerate to form larger urban area having population more than 20000 as per census 2001.

3. Out Growths (OG)

• An out growths is a viable unit such as a hamlet or village and clearly identifiable in terms of its location and boundaries.

4. Metropolitan cities

• Metropolitan cities is a large city with population in excess of 1 million (10 lakhs) and may consists of a number of suburban areas attached to a core city centre.

5. Mega cities

• Mega cities occurs when two or more metropolitan cities lie adjacent to eachother forming a continuous urban agglomeration.
• Usually mega cities have population more than 10 millions.

6. Boom towns and Niche cities

• Although the boom towns and niche cities are quite small in terms of population, income and spending as compared to mega cities, their rate of growth is definitely higher.