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1. Rasters are made up of a matrix of pixe … 1. Rasters are made up of a matrix of pixels (also called cells), each containing a value that represents the conditions for the area covered by that cell. A raster dataset is composed of rows (running across) and columns (running down) of pixels. Each pixel represents a geographical region, and the value in that pixel represents some characteristic of that region.esents some characteristic of that region.
, 2. A raster consists of a matrix of cells … 2. A raster consists of a matrix of cells (or pixels) organized into rows and columns (or a grid) where each cell contains a value representing information. The cell values represent the phenomenon portrayed by the raster dataset such as a category, magnitude, height, or spectral value. Cell values can be either positive or negative, integer, or floating point. Integer values are best used to represent categorical (discrete) data, and floating-point values to represent continuous surfaces.t values to represent continuous surfaces.
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