to establish the relationship between page coordinates (i e x,y) of a planar map of image with known real-world coordinates (i e longitude/latitude, UTM, etc) Also referred to as registering
The process of converting a map or image into real-world coordinates A non-georeferenced map or image is said to be in 'digitizer-inches' or 'scanner-inches', i e , it has no real world coordinates
The process of establishing a relationship between data in Cartesian coordinates on a flat map to known ground-truth geographic coordinates (See Cartesian coordinate system)