File:Americas satellite map.jpg

原始文件 (2,300 × 2,900像素,文件大小:1.87 MB,MIME类型:image/jpeg


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NASA's description of the original non-cropped imageː "This spectacular “blue marble” image is the most detailed true-color image of the entire Earth to date. Using a collection of satellite-based observations, scientists and visualizers stitched together months of observations of the land surface, oceans, sea ice, and clouds into a seamless, true-color mosaic of every square kilometer (.386 square mile) of our planet. These images are freely available to educators, scientists, museums, and the public. This record includes preview images and links to full resolution versions up to 21,600 pixels across. Much of the information contained in this image came from a single remote-sensing device-NASA’s Moderate Resolution Imaging Spectroradiometer, or MODIS. Flying over 700 km above the Earth onboard the Terra satellite, MODIS provides an integrated tool for observing a variety of terrestrial, oceanic, and atmospheric features of the Earth. The land and coastal ocean portions of these images are based on surface observations collected from June through September 2001 and combined, or composited, every eight days to compensate for clouds that might block the sensor’s view of the surface on any single day. Two different types of ocean data were used in these images: shallow water true color data, and global ocean color (or chlorophyll) data. Topographic shading is based on the GTOPO 30 elevation dataset compiled by the U.S. Geological Survey’s EROS Data Center. MODIS observations of polar sea ice were combined with observations of Antarctica made by the National Oceanic and Atmospheric Administration’s AVHRR sensor—the Advanced Very High Resolution Radiometer. The cloud image is a composite of two days of imagery collected in visible light wavelengths and a third day of thermal infra-red imagery over the poles. Global city lights, derived from 9 months of observations from the Defense Meteorological Satellite Program, are superimposed on a darkened land surface map."

The 8192 x 4096 TIFF NASA global map has been cropped, adjusted in brightness, and converted to JPEG.
日期
来源 http://visibleearth.nasa.gov/view_rec.php?id=2433
作者 NASA
其他版本 Derivative works of this file:  Distribution of P. peckolti.jpg

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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image/jpeg

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414401b78c1c95749a0b485b262f063cbfb3be6a

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2,900 像素

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当前2008年6月28日 (六) 17:232008年6月28日 (六) 17:23版本的缩略图2,300 × 2,900(1.87 MB)WolfmanSF{{Information |Description=This spectacular “blue marble” image is the most detailed true-color image of the entire Earth to date. Using a collection of satellite-based observations, scientists and visualizers stitched together months of observations
2007年12月30日 (日) 19:542007年12月30日 (日) 19:54版本的缩略图2,300 × 2,900(1.93 MB)WolfmanSF{{Information |Description=This spectacular “blue marble” image is the most detailed true-color image of the entire Earth to date. Using a collection of satellite-based observations, scientists and visualizers stitched together months of observations

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