GIS - satellite images

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There are many precise and amazing satellite images available on the web, many of them are from NASA:

DigitalGlobe.com
map of the world, you click, you get a precise image of the location



>>With the launch of its QuickBird satellite in October 2001, DigitalGlobe became the world's highest resolution commercial satellite imagery provider.
Because DigitalGlobe was founded by geographic information systems (GIS) and mapping users, the company understands its customers' unique needs for geospatial information products for a number of mapping and planning applications. While DigitalGlobe's formidable leadership has ensured solid financing, world-class management and legendary marketing vision, the company's customer-friendly culture positions DigitalGlobe as the industry's leader in the geospatial information market

Products


The diversity of DigitalGlobe's products enables the company to respond to a variety of customer needs for numerous applications. DigitalGlobe's value-added applications such as 3D visualization, Web mapping services support and Internet distribution infrastructure improve the usability and accessibility of all DigitalGlobe products for customers who rely on GIS and mapping. Standard offerings include:


   Basic Imagery
   Standard Imagery
   Panchromatic Imagery
   Multispectral Imagery
   Pan-sharpened Imagery
   Color Infrared Imagery
   Mosaics
   Stereo Imagery
   Digital Elevation Models (DEMs)
   Geometric and Ortho Corrections
   Imagery-Derived Information Extraction
   Data Fusion
   Direct Imagery Downlinks
   Library Data and New Data Acquisition
     by Request

The QuickBird Satellite and the ImageLibrary

QuickBird orbits at an altitude of 450 kilometers, in a 98-degree, sun-synchronous orbit. The spacecraft collects the world's highest resolution commercial imagery of the Earth, and boasts the largest image size and the greatest on-board storage capacity of any other satellite. The 60-centimeter resolution of QuickBird images allows objects on the ground as small as 60 centimeters - or two feet - across to be seen. DigitalGlobe's ImageLibrary houses the most comprehensive, up-to-date images available in the world. Since January 2002, QuickBird has collected and stored in its ImageLibrary hundreds of thousands of image scenes covering hundreds of millions of square kilometers. The satellite collects an additional one million square kilometers each week.




NOAA nightime images