GIS Dictionary

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sampling

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  1. [data capture] The collection of data for only a portion of the region or population used to make inferences about the characteristics of the population from which the portion (sample) was drawn.
  2. [remote sensing] In imagery, the capture and recording of a discrete, spatial, electromagnetic signal with a sensor. For electro-optical sensors, sampling rate is determined by the optics and spacing of photosensitive cells on the focal plane, resulting in a point spread function and other source image characteristics. If an image is geometrically processed further, it is considered resampled.

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