日與夜

sandycars

pacificlub

You see this photo is a bit strange on the Africa, how come so many "lights" in Africa??  Really cannot be expected!!!

大支嘢一號

It's india with many lights, not africa. Africa is on the left hand side one.

歐拉

夜晚的地球真美

barying

pacificlub 發表於 2013-5-3 10:38
You see this photo is a bit strange on the Africa, how come so many "lights" in Africa??  Really c ...

NASA EARTH OBSERVATORY IMAGE OF THE EARTH’S CITY LIGHTS.
Credit: Data courtesy Marc Imhoff of NASA GSFC and Christopher Elvidge of NOAA NGDC.
Image by Craig Mayhew and Robert Simmon, NASA GSFC.

Metadata
Sensor: IMAGE
Data Date: October 1, 1994 - March 31, 1995
Visualization Date: October 23, 2000

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.


Images & Animations
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earth_lights.jpg
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earth_lights_lrg.jpg
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land_ocean_ice_lights_2048.tif
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earth_lights_4800.tif
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land_ocean_ice_lights_8192.tif
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land_lights_16384.tif
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earth_lights.gif
Lights only
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GIF 363 KB

nightearth.gif
Lights only
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GIF 6 MB

sex_10m

回應 sandycars #1 的帖子

有D是創作架

mm128

Good picture, thanks for ching sharing

低收入人士

而家創作仲靚過原作

hyugakojiro

嘩，好靚呀

fsmcat

好漂亮的相片。