The highest ground resolution that can be obtained from the current AVHRR instruments is 1.1 kilometer (0.7 miles), which means that the satellite records discrete information for areas on the ground that are 1.1 by 1.1 kilometers.
Land coverage and ground resolution: All but two of the satellites will cover the total land mass since they are in polar sun synchronous orbit.
The standard digital orhthophoto produced by the USGS is a black-and-white, or color infrared, 1-meter ground resolution quarter quadrangle image.
The RBV consisted of three television-like cameras aimed at the same ground area (185x185km, with a ground resolution of 80m), the channels calibrated to roughly approximate the red-green-blue spectral characteristics of color infrared film.
Geological Survey (USGS) are either gray-scale, natural color, or color-infrared (CIR) images with 1-meter ground resolution. They cover an area measuring 3.75-minutes longitude by 3.75-minutes latitude or 7.5-minutes longitude by 7.
Digital Orthophoto Quad (DOQ) - A United States national mapping program which aims to cover the lower 48 states at a 1-meter ground resolution using monochrome air photographs in digital format with a 1:12,000 equivalent ground extent.
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It is helpful, for successful GIS projects, if the user has some knowledge about the terrain and elevation data to insure that the ground resolution, horizontal accuracy, and vertical accuracy fit the project criteria.
 See also: Resolution, Image, Information, Cover, Area
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