GeoEye-1, launched in September 2008, is the latest in a series of commercial high-resolution Earth observation satellites. With its ground sample distance (GSD) of 0.41m for the panchromatic band, GeoEye-1 offers the highest resolution yet available to the spatial information industry. However, for commercial users, image products are down-sampled to 0.5m GSD. Specifi cations for GeoEye-1 quote an accuracy in geolocation of better than 3m without ground control, specifi cally 2m and 2.5m Circular Error 90% (CE90) in planimetry for stereo and mono, respectively, and 3m Linear Error 90% (LE90) in height for stereo coverage(GeoEye, 2009).
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GIS Weekly Magazine
Susan Smith
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Look for the next issue of GIS Weekly Magazine on May 28, 2012.
Each GISWeekly Review delivers to its readers news concerning the latest developments in the GIS industry, along with a selection of other articles that we feel you might find interesting. |
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