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OpenStreetMap (OSM) is a collaborative project that collects and distributes data for maps, navigation and other applications. Learn about its history, data structure, licensing, features and applications from the online encyclopedia.
This web page lists some locations on free, publicly viewable satellite map services that have such issues due to censorship, blurring, or low resolution. It does not show a blurred satellite image of the earth, but it mentions some countries and regions that are partially or completely obscured.
Google Earth is a web and computer program that renders a 3D globe based on satellite imagery, aerial photography, and GIS data. Users can explore the Earth, add their own data, view photos, Street View, and more, but also face privacy and security issues.
National Geophysical Data Center: All free data from the NGSC. Includes elevation models, land cover, seismology, etc. The Geospatial Platform: Search for and download a wide variety of datasets from this portal developed by the member agencies of the Federal Geographic Data Committee through collaboration with partners and stakeholders.
Learn about the origins, uses and features of satellite images of Earth collected by various governments and businesses. Explore the types of resolution, spectrum and data sources of satellite imagery and their applications in weather, oceanography, agriculture, biodiversity and more.
Landsat 7 was launched on 15 April 1999 and is a satellite imagery program managed by NASA and USGS. It has a Sun-synchronous orbit, a 15-metre panchromatic band, and a 30-metre multispectral band, and provides data for various scientific applications.
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