The term raster data is often contrasted with vector data, in which geometrical points, lines, curves, and shapes are based upon mathematical equations, thus creating an image without specific mapping of data to pixels.
A still image is data in which a grid or raster of picture elements (pixels) has been mapped to represent a visual subject, e.g., the page of a book or a photograph.
Digital file types describe the types and characteristics of the files produced from the digitization of original record materials at NARA, as well as the standard or most common data formats that the Digitization Services Branch uses to store digitized records.Ī type of digital object that is created from the digitization of still image (textual documents and photographs) originals.
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