Definitions for "World file"
Keywords:  redlands, wld, arcview, esri, utm
a one- or two-line text file that includes the x and y coordinates of a CAD point, first in local coordinates, then in UTM coordinates and has a WLD extension
a small text file that accompanies some image file formats such as JPG, PNG, BMP and TIFF
a small text file that contains the parameters of the transformation equation which fits the image to its location on the map base