By 2025, the developing world will be home to 29 megacities.
Through this interactive mapping feature with rich call-out boxes, the reader can explore the latest UN estimates and forecasts on the growth of megacities (urban areas with over 10 million residents). These 'cities on steroids' have been growing tremendously since the 1950s and present a unique set of geographic challenges and opportunities for their residents.
TED Talks 400 years after Hudson found New York harbor, Eric Sanderson shares how he made a 3D map of Mannahatta's fascinating pre-city ecology of hills, rivers, wildlife -- accurate down to the block -- when Times Square was a wetland and you...
KC: The Manhattan Project created a picture of the area before the development of a city, the way Henry Hudson did during his 1609 exploration. After 10 years (1999-2009), the research project has expanded to study the entire city of New York. The Welikia Project analyzes geography and landscape ecology to discover the original environment and compare it to present day. Scientists have learned that world's largest cities once had a natural landscape of freshwater wetlands and salt marshes, ponds and streams, forests and fields with an equally diverse wildlife community. By focusing on the city's biodiversity of 400 years ago and the modern era, information can be gathered about what has changed, what has remained constant, where the city was done well and where it needs to improve. This source is useful because it allows for the visualization of NYC in a way never seen before. Urban environments, such as NYC, have a landscape largely created by humans, so the skyscrapers, pavement, and mass population is far removed from the landscape it once was.
“Nothing tells us more about the spread of humans across the Earth than city lights.”...
"For three weeks spread out over April and October of this year, the Suomi NPP satellite (jointly of NASA and NOAA) scanned all the Earth's land as it appeared at night. Scientists then mapped the satellite's data -- 2.5 terabytes of it -- over an earlier Blue Marble image, transforming that picture's daytime blues, browns, and greens into a nightime palette of blues, blacks, and gold."
This video is a great compliment to the classic Earth at Night composite image as well as the adjusted cartogram for population density.
Questions to Ponder: What do these lights "tell us" about human geography? What does the intensity of the lights indicate?
Coastal and low-lying areas that would be permanently flooded in three levels of higher seas.
This interactive feature is designed to answer a simple, yet profound set of questions. What areas (in over 20 cities around the U.S.) would be under water if the ocean levels rose 5 feet? 12 feet? 25 feet? The following set of maps show "coastal and low-lying areas that would be permanently flooded without engineered protection."
Patrick assesses the future of world order, state sovereignty, and multilateral cooperation.
The 21st century is the dawn of a new era in human history: more people on Earth live in cities than in the countryside. The impacts of this new basic fact are far-reaching. One of those is that cities that are in particular environments are more prone to certain natural disasters and will be increasingly vulnerable as their populations increase (especially megacities in the developing world).