This type of spatial data usually bulky and required large storage capacity.Įxample of raster data as satellite imagery, digital elevation model (DEM), aerial photography, Scanned maps etc.Īll pixels in a raster data must be the same size, determining the resolution. Each pixel preserves locational information. It is represented by matrix or grid of pixel. Raster data comes in the form of individual pixels. Thus the attribute is represented as a single value of each pixel or cell that is called as DN (Digital Number Value). When the data is geo-referenced the data give each and every pixel its locational information. The raster data are the data that have individual pixels where each pixel has its spatial location in referenced to real earth.
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