QUOTE(PrimaMateria @ Aug 6 2010, 12:58 PM)
I have never done evocation before but i have read up on it and i was wondering what spirits are safe to summon and if you can just scry to see what spirits are in the area?
I know of at least one person who can scry effectively.
As far as which spirits are safe, avoiding demons is probably the best piece of general advice I can give you. Bardon would probably tell you that avoiding elementals for the most part is advisable, as well.
The four cardinal archangels are fine. I've never heard of anyone having problems with planetaries, either; although you will probably want the relevant initiations for those. Bardon lists 360 heads of the Earth sphere, and he implies that they are at least agreeable, if not actually virtuous.
Avoid the Goetia. Not all of them are outright evil, but many of them are, and different people tend to get very different results. Avoiding the Necronomicon also should hopefully go without saying. I would probably also avoid Enochian stuff as well, myself. I'm not sure why, but the Enochian spirits have just never felt right to me, for some reason.