====== World Files ======
World files are plain text files used along side a normal image file.  The world file tells a GIS program how to render the image.  The filename is the same as the main image, with a different extension:
^actual image file^world file extension^
|jpg|jgw|
|tif|tfw|

The contents of a world file consist of six lines, as shown in the following example:
^line #^example value^description^
^1|0.17578125|x-scale value|
^2|0|y rotation/skew|
^3|0|x rotation/skew|
^4|-0.17578125|y-scale value * I think this always needs to be negative|
^5|-180|top-left x coordinate|
^6|90|top-left y coordinate|

* Note that the coordinates need to be in the units of the actual projection of the image