GEOG187 Study Guide - Quiz Guide: Map Algebra, Spatial Analysis, Data Quality
10 Oct 2016
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Issues of mixed pixels: level of detail is relative to spatial resolution of sensor or data creation method, different satellites and sensors have different resolutions. Compare one cell in one layer to same cell in another layer to create new output: focal operation. Compare the value in each cell with values in its neighbouring cells. Operations such as max, min, mean, sum, range: zonal operation. Map zones are defined based on common value and operations applied with respect to these zones: global operation. Produce results that may depend on values of all cells in the grid. Discovered that light is comprised of all visible colours. Discernable colours are the result of absorption and reflectance of specific wavelengths: modern day importance. Space borne sensors are manufactured to observe specific wavelengths of. Discovered infrared radiation, portion of ems where heat is radiated. Visible light portion of ems does not modify temperature of incident targets: modern day importance.
