Used as attribute file associated with corresponding image file.
World files consist of 6 lines, denoting the following:
sampleFile.tfw
| 5.000000000000 | (size of pixel in x direction) |
| 0.000000000000 | (rotation term for row) |
| 0.000000000000 | (rotation term for column) |
| -5.000000000000 | (size of pixel in y direction) |
| 492169.690845528910 | (x coordinate of centre of upper left pixel in map units) |
| 5426523.318065105000 | (y coordinate of centre of upper left pixel in map units) |