Few questions about the map editor

[MightyMonte88]

When i load up any of the available maps in the editor, none of the zones , nodes, ground items or anything spawn. Is this normal? Since i plan to make changes to the maps to accommodate the mods i've come up with, will i have to go back, rezone the entire map, and place all the resource nodes( sand, clay, ore and so on) ?? also is there a way to copy and paste while in the editor?