What is the meaning of high spatial frequency?
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You'll need to understand the concept of a visual angle from our previous discussion, to appreciate the concept of spatial frequency. Spatial frequency refers to the level of detail present in a stimulus per degree of visual angle. A scene with small details and sharp edges contains more high spatial frequency information than one composed of large coarse stimuli.
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Two kinds of data are usually associated with geographic features: spatial and non- spatial data. Spatial data refers to the shape, size and location of the feature. Non- spatial data refers to other attributes associated with the feature such as name, length, area, volume, population, soil type, etc ..
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