For all intensive porpoises, it looks like an "isometric" drawing, which has a 1:1:1 aspect ratio. If you drew a 1" cube in this, every line defining the surfaces intersection would be... 1". Perspective drawing looks "realer" to the human eye, but it's a bitch to get accurate measurements from. If you handed a perspective drawing to an engineer and said
"make this" he'd fall over laughing, or at least twitch an eyebrow - engineer stylin'.
arty07:
Engineering drawings are strictly for communicating information. There's another type called "bi-metric" which is drawn using X, Y, Z values of 4:4:3 or 4:3:3, depending on which features of the object needed more emphasis, although you'd ALWAYS need at least two drawings in 2 dimensions to cover everything. The ratios used go right in the page's title block, and all the engineers know the secret handshake. This might seem prissy about a cube ( or a bridge!) but these are what they used to build houses and space shuttles and all. The only reason I know this is because I shacked up with a lady architect who's sole job was to take a pile of new-house engineering drawings and make warm happy HOME drawings for the prospective buyers - perspectivetise them, throw in some trees and bushes, happy little junior on his bicycle, an adorable li'l doggie etc.
"make this" he'd fall over laughing, or at least twitch an eyebrow - engineer stylin'.

Engineering drawings are strictly for communicating information. There's another type called "bi-metric" which is drawn using X, Y, Z values of 4:4:3 or 4:3:3, depending on which features of the object needed more emphasis, although you'd ALWAYS need at least two drawings in 2 dimensions to cover everything. The ratios used go right in the page's title block, and all the engineers know the secret handshake. This might seem prissy about a cube ( or a bridge!) but these are what they used to build houses and space shuttles and all. The only reason I know this is because I shacked up with a lady architect who's sole job was to take a pile of new-house engineering drawings and make warm happy HOME drawings for the prospective buyers - perspectivetise them, throw in some trees and bushes, happy little junior on his bicycle, an adorable li'l doggie etc.