![]() 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. ![]() Visualising Population Density Across the Globe ![]()
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