Kudos on the wiki. My only 'beef' is my personal beef of maps with scales of X km/miles per Pixel. I realize that may be how it is done in the graphics program, but with everyone have likely different outputs on their monitors (i.e. 1280x800 or 1024x76, these scales are never really accurate representations. A scale bar however, will always be relatively accurate regardless of the output ratio of someone's monitor.