When these early Europeans wished to honor their Gods, they created a connection between their homeland, where their Gods resided, and the land where they stood. In this way, the new land became a part of the homeland. The elemental correspondences to the cardinal directions act as a way of aligning yourself with the homeland.
When a witch is within the land that is within the boundaries of the homeland, they do not need to use the correspondences to make a connection, instead, they evoke (or invoke) the land itself. The concept of the homeland is something very integral to the religion of Witchcraft, but also something that is completely missing from Neo-Paganism.
Free eBooks (Can Be Downloaded):
George Lyman Kittredge - Notes On WitchcraftAllen Greenfield - A True History Of Witchcraft
Alexander Roberts - A Treatise Of Witchcraft