Spatial resolution refers to the smallest discernible unit of space captured in an image or dataset and indicates how much detail a system can capture in a spatial dimension. In various contexts, it has specific meanings: 1. **Remote Sensing**: In satellite imagery or aerial photography, spatial resolution refers to the size of the smallest object that can be detected. For example, if an image has a spatial resolution of 10 meters, it means that objects smaller than 10 meters cannot be distinguished.
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The ability of an imaging or measurement system to distinguish nearby spatial features. A resolution criterion must specify the features and measurement conditions: diffraction, noise and sampling can all limit the distinction. A small pixel spacing alone does not establish high spatial resolution; electron microscope resolution illustrates the role of wavelength and numerical aperture.