by vagrom » Thu 14 Jul, 2011 5:02 am
If you Google "Gradient", then the 8th item down (website of Macquarie Uni Faculty of Science) gives it to you pretty simply and of the 3 choices, the 1:20 option looks good: 1 vertical to 20 horizontal. The two pages belong directly to a mapping shop lesson.
I've seen High Camp Hut up to Mt Eliza described as 1:1, or a 45deg. incline.
Surgite et .. andiamo!