File:United States (4691436388).jpg

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DescriptionUnited States (4691436388).jpg	This image of Earth’s city lights was created with data from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Originally designed to view clouds by moonlight, the OLS is also used to map the locations of permanent lights on the Earth’s surface. Credit Data courtesy Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC. Image by Craig Mayhew and Robert Simmon, NASA GSFC. NASA Goddard Space Flight Center is home to the nation's largest organization of combined scientists, engineers and technologists that build spacecraft, instruments and new technology to study the Earth, the sun, our solar system, and the universe. Follow us on Twitter Join us on Facebook
Date	11 June 2010, 13:27
Source	United States
Author	NASA Goddard Space Flight Center from Greenbelt, MD, USA

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This image was originally posted to Flickr by NASA Goddard Photo and Video at https://flickr.com/photos/24662369@N07/4691436388. It was reviewed on 25 October 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	06:50, 25 October 2017		690 × 376 (142 KB)	A1Cafel (talk \| contribs)	Transferred from Flickr via Flickr2Commons

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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Image title	EARTH'S CITY LIGHTSCredit Data courtesy Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC. Image by Craig Mayhew and Robert Simmon, NASA GSFC.This image of Earth’s city lights was created with data from the Defense Meteorological Satellite Program (DMSP) Operational Linescan System (OLS). Originally designed to view clouds by moonlight, the OLS is also used to map the locations of permanent lights on the Earth’s surface.The brightest areas of the Earth are the most urbanized, but not necessarily the most populated. (Compare western Europe with China and India.) Cities tend to grow along coastlines and transportation networks. Even without the underlying map, the outlines of many continents would still be visible. The United States interstate highway system appears as a lattice connecting the brighter dots of city centers. In Russia, the Trans-Siberian railroad is a thin line stretching from Moscow through the center of Asia to Vladivostok. The Nile River, from the Aswan Dam to the Mediterranean Sea, is another bright thread through an otherwise dark region.Even more than 100 years after the invention of the electric light, some regions remain thinly populated and unlit. Antarctica is entirely dark. The interior jungles of Africa and South America are mostly dark, but lights are beginning to appear there. Deserts in Africa, Arabia, Australia, Mongolia, and the United States are poorly lit as well (except along the coast), along with the boreal forests of Canada and Russia, and the great mountains of the Himalaya.The Earth Observatory article Bright Lights, Big City describes how NASA scientists use city light data to map urbanization.
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Image width	690 px
Image height	376 px
Date and time of digitizing	09:26, 11 June 2010
File change date and time	09:27, 11 June 2010
Date metadata was last modified	09:27, 11 June 2010
Software used	Adobe Photoshop CS3 Macintosh
Keywords	World Cup USA FIFA NASA Goddard Space Flight Center Soccer World Cup 2010 FIFA World Cup 2010
Urgency	1
IIM version	4

File:United States (4691436388).jpg

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