What is the format of an ESRI World File?
The ESRI World File uses a six-parameter affine transformation to effect its image to world transformation where x’ is the world coordinate of the pixel located at row x and column y: 1. y’ is the world coordinate of the pixel located at row x and column y; 2. A is the x-scale or dimension of a pixel in world units in x direction; 3. B, D are rotation terms; 4. E is the negative of the y-scale or dimension of a pixel in world units in y direction assuming an upper left image origin with row values increasing downward; and 5. C, F are translation terms or the x and y world coordinates of the center of the upper left pixel. The transformation parameters are in ASCII format (one per line) in the following order: A, D, B, E, C, F. The following is an example: A* 20.0 D* 0.0 B* 0.0 E* -19.6 C* 100000.0 F* 200000.0 * Reference only – letters do not actually appear in the file.
