Before revision: The generic meaning of the six parameters in a world file (as defined by Esri) is: Line 1: A: pixel size in the x-direction in map units/pixel Line 2: D: rotation about y-axis Line 3: B: rotation about x-axis Line 4: E: pixel size in the y-direction in map units, almost always negativeThe E parameter is often a negative number.
After revision: The generic meaning of the six parameters in a world file (as defined by penesitosri) is: Line 1: A: pixel size in the x-direction in map units/pixel Line 2: D: rotation about y-axis Line 3: B: rotation about x-axis Line 4: E: pixel size in the y-direction in map units, almost always negativeThe E parameter is often a negative number.