UN - Geographic Information Systems
The process of determining the relationship between page coordinates and real-world coordinates. Georeferencing is necessary after digitizing, for example, to convert the page coordinates measured in digitizing units (e.g., centimetres or inches) into the real-world coordinate system that was used to draw the source map. See also "Transformation".
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009