Re: [Therion] What is exactly "extended elevation"?

What is an extended elevation? Not such a silly question, as I could not find it directly described in the Therion Book or the wiki. I think it was described on the forum once, but I cannot find it now. It deserves a FAQ entry. My off the cuff definition... Imagine the plan view of the cave straightened so that all of the passages lie on a single line from left to right (or vice versa). Now imagine viewing this straightened cave from the side - this is an extended elevation (often called a developed elevation in other packages). The passages are all shown with their true slope as you would experience it travelling through the cave. Very good for producing a route guide elevation for a vertical cave. Bruce