Using Address to provide Coords or Lat Long

Right now I've got a content type with a CCK text field for address that's geocoding. I've then got a view that's pulling together the openlayers map from that field. What would be the best way of also allowing a CCK field for Lat Long that could be used instead of the address. The address will always be input, but in times when it's not accurate enough the user can add coords. Also in the view how would you distinguish the two?