Satellite image resolution

The practice of aerial photogrammetry can be used as a reference for the reference and analysis of satellite images and the selection of drawing scale. This is because their mapping principles are similar, and aerial photogrammetry has a lot of practical experience and experimental data, which is very mature. There is no direct requirement for image resolution in aerial photogrammetry, but it can be inferred from the requirement for objective resolution of camera and photographic scale. The resolution of camera lens in aerial photography indicates the minimum line width that can be resolved on the image after aerial photography (the resolution of film and image paper is not considered here). According to the Specification for Aerial Photography (GB/T1561-1995), the lens resolution in the effective use area of aerial cameras is "no less than 25 line pairs per millimeter". According to the objective resolution and photographic scale, the corresponding ground resolution d on aerial photographic images can be estimated, that is, d = m/r (where m is the denominator of photographic scale and r is the lens resolution. )。 According to the "Selection of Aerial Photography Scale" in the Code of Aerial Photography and the above formula, the following table can be obtained-Surveying and mapping scale aerial photography.