# WLD – ESRI World File

A world file file is a plain ASCII text file consisting of six values separated by newlines. The format is:

    pixel X size
    rotation about the Y axis (usually 0.0)
    rotation about the X axis (usually 0.0)
    negative pixel Y size
    X coordinate of upper left pixel center
    Y coordinate of upper left pixel center

For example:

    60.0000000000
    0.0000000000
    0.0000000000
    -60.0000000000
    440750.0000000000
    3751290.0000000000

You can construct that file simply by using your favorite text editor.

World file usually has suffix `.wld`, but sometimes it may has `.tfw`, `.tifw`, `.jgw` or other suffixes depending on the image file it comes with.