urbanisation Flashcards
definition of a megacity
a city with over ten million inhabitants
world city definition
a city considered to be an important hub in the world economic system
city definition
(technically no official definition) in the UK home to at least 300,000 residents, a distinct identity that is the centre of a wider area, and a good record of local government
how would you present population data and why?
geolocated proportional circles, because you would be able to easily see spatial patterns and size patterns from a glance. compare different countries/continents visually and easily
what factors might make people want to move into cities?
entertainment, convenience, community, transport, jobs
negatives of living in cities
traffic, pollution, overcrowding, volatility, commerciality
proportional circles to population formula
radius = √ (population/π) / 4000
distribution of megacities today
not evenly distributed
most in the east, especially Asia
China was home to 6 in 2016
some in the Americas and Europe but these tend to be older megacities
Japan and India only countries in Asia to have megacities in 1950
examples of megacities
London, UK – population of around 10 million
Lagos, Nigeria – population of around 21 million
Seoul, South Korea – population of around 10 million
most important world cities to least important
alpha ++
alpha +
alpha
alpha -
beta +
beta
beta -
gamma +
gamma
gamma -
negatives of proportional circles
no exact data
can be difficult to produce
percentage increase equation
% increase = (difference / original) x 100
urban sprawl definition
cities expanding out into rural areas
urbanisation definition
the increasing proportion (%) of population living in urban areas
rural to urban migration
the process of people leaving rural areas and moving to the city
marginal land definition
land that is undesirable for human habitation and has little potential for profit (often where people choose to build slums)
marginal land examples
steep slopes, train tracks, near factories, near sewage works
push factors for urbanisation
lack of jobs (less farming jobs available due to advances in tech), poor living conditions,
how do urban growth rates vary with development
more developed countries have lower urban growth rates, because their cities are already established
less developed countries have higher UG rates because their cities are emerging and with that comes lots of rural-urban migration and expanding infrastructure
