The engineer or achitect may have been familiar with a device of the time called a 'digitiser'. In a manner somewhat similar to a mouse, it's used to precisely click points on a 2D surface for digitising physical drawings. And the coordiates are absolute in relation to the digitiser surface, not relative like a mouse. This may have led to the confusion!
Posts by mrrrk
2 publicly visible posts • joined 2 Nov 2018
Help! My mouse climbed a wall and now it doesn't work right
Nikola Tesla's greatest challenge: He could measure electricity but not stupidity
Friday 2nd November 2018 14:51 GMT
Fifty Pound Note
James Clerk Maxwell needs to be on the new fifty pound note. He's British (ok, Scottish) and he's up there with Newton and Einstein - but no bugger's heard of him. Put his equations (instead of some simple unit definition attributed to Tesla) on the note and that'll really fox the parents...