imagery—Electric signals from a sensor (amplified and/or modified electronically) recorded on a photographic film (or displayed on a monitor), such that the images produced have a spatial relationship in pattern and detail to the direction of the phenomenon sensed. Infrared imagery is such a recording of the radiated electromagnetic energy in the infrared range of the electromagnetic spectrum from the surface of the earth and objects on it. Radar imagery is such a recording of the return to the sensing instrument of reflected radar signals.

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Source: NSPS “Definitions of Surveying and Related Terms“, used with permission.

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