I think most of this data is provided by private companies, although I could be mistaken.
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DigitalGlobe is building a constellation of high-resolution earth imaging satellites and a comprehensive geo-information product store -- DigitalGlobe.com -- that allows you to quickly access and order a wide variety of imagery and derivative information products, including our 70-centimeter panchromatic and 2.8-meter multispectral imagery--the highest resolution satellite imagery available commercially. All together, our data sources will represent the market's most robust collection of up-to-date spatial information.
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