Urban densities are linked to cultures of living, with regions like Latin America and East Asia noted for high density urban forms. Similar desakota patterns can be seen in Kolkata, Dhaka, Lahore and Beijing regions, and increasingly in several regions of Sub-Saharan Africa including Nigeria and surrounding Lake Victoria, though with much diversity in each case.
McGee first used the term desakota ("village-city") in relation to the incredible form of Java in Indonesia, with the densities of urban hinterlands greatly exceeding Western cities but with activity patterns remaining dispersed and linked to agriculture. China has many, the largest being the Pearl River Delta region, and the Yangtze River Delta megaregion, both with around 50m population and growing significantly.Īnother related form of megaregion comes from areas of dense agriculture that begin to urbanise with looser patterns of small scale industry.
The GHSL data shows how widespread urban megaregions have become. A classic example is the northeastern seaboard of the USA (click on links to focus the map), a megalopolis as Gottman termed it, stretching hundreds of miles from Washington to Boston, with around 55m people. In the early 20th century, geographers like Patrick Geddes observed how rail and road networks were allowing rapidly growing cities to fuse together into vast sprawling conurbations. Some introductory highlights are discussed here with links for further information. The GHSL dataset encourages understanding of the complex hierarchy of human settlement, rather than making simple rural-urban divisions. This interactive map has received 250,000 visitors since 2017, indicating the demand for high quality global population visualisations. Integrating huge volumes of satellite data with national census data, the GHSL has applications for a wide range of research and policy related to urban growth, development and sustainability, and is available as open data. This interactive map shows data from the Global Human Settlement Layer (GHSL) produced by the European Commission JRC and the CIESIN Columbia University. Location, Location, Location, on the Earth Observatory.Visualising Population Density Across the Globe.
US POPULATION DENSITY MAP ARCHIVE
One of the Distributed Active Archive Centers in NASA’s Earth Observing System Data and Information System, SEDAC provides information about human interactions in the environment. This particular population density map is based on a global population density map created at the Socioeconomic Data and Applications Center (SEDAC) at Columbia University. In the comparison, trends that track the human footprint can emerge. How does population density relate to changes in land cover? How are natural resources distributed in relation to population? How do densely populated regions, with their pollution, artificial surfaces, and urban heat islands, affect climate? To answer these and other questions, scientists compare detailed population maps to other geographically based data sets, including satellite data. Other large western cities readily visible here include Portland, Seattle, Phoenix, and Denver.įor Earth scientists, population density maps can be crucial in answering questions about the relationship between people and the environment. Like their counterparts in the east, the largest cities in the west (San Diego and Los Angeles in the south San Francisco, Oakland, and San Jose farther north) hug the coast, with the densest populations in Southern California. The west remains lightly populated except for clearly defined urban regions. Other cities-Atlanta, Chicago, Houston, and Dallas-punctuate the map in the country’s interior. Rings of decreasing population density radiate out from the major urban centers of New York, Philadelphia, and Washington along the East Coast. Where are all of these people living? This map, based on population estimates made in 2005, charts out the number of people in every square kilometer of the United States.Īs has been the case historically, the most densely populated parts of the United States are east of the Mississippi River. With one birth every 7 seconds, a death every 13 seconds, and a migrant entering the country every 31 seconds, the United States’ population is growing at a rate of one person every 11 seconds. The population of the United States reached 300 million on October 17, 2006, said the U.S.
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