Definition
An instrument used for plotting straight lines and measuring angles on a CHART or PLOTTING SHEET. See PROTRACTOR. In data processing it stands for (a) Vector plotter: An electromechanical device for automatically drawing curves. The curves are generated by a sequence of linear incremental pieces ("vectors") depending on the resolution provided by the device. For cartographic purposes, high precision FLAT-BED PLOTTERS (drawing tables) are used. (b) Raster or electrostatic plotter: A sophisticated electronic device for producing pictures by means of raster techniques. The picture is generated by lines of PIXELS drawn sequentially, typically with a resolution of 200-400 pixels per inch. Raster plotters can produce complete pictures in short time irrespective of the complexity of the picture's contents.