Anyone still defending this abomination on the grounds of ‘getting things right’ could do worse than check the list of flaws in the tech offered by
Pierre's PC in yesterday’s shoutbox. Some of these have been widely aired, but there are some eye-openers in this lot, for me at least:-
In cricket, there's a very small area where action happens. The crease doesn't move, balls can be tracked easily as there's at least a few centimetres to base projection on. In football there are a near infinite amount of possible player and ball positions that can extend from the halfway line to the goal line. We are expecting a low resolution, standard refresh camera to track this.
Has the camera been calibrated to ensure that its level? If not any vertical lines drawn will not be correct.
Is the camera capturing at the exact moment of contact?
Is there any compensation for sloped pitches?
Are the operators looking at raw images or compressed digital images?
Are the cameras set up exactly the same at each ground to ensure repeatability?
Points #4 and #6 suggest the “it‘s the same for everyone“ defence may not apply, either.