I stumbled across a nice plugin from this site. (http://www.users.cloud9.net/%7egparet/photoshop/) It produces a grid of any spacing either as a selection to be stroked or as a new layer.

I have a map of a large area I'm photographing. By scanning the map and overlaying a grid, I can identify the grid coordinates of each photo taken if I wish to return.

Maybe someone else can use this technique.

Great find. The grid plugin will come in very handy.

Thx for sharing this golden nugget.

~Danny~