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Eleanor Dodson wrote: > First you must be on the same origin > > There are various ways to get there - brute force method is to > calculate phases from both models, combine them, and use the > reflection utility phase match to move one to the other by an > appropriate origin shift... > > Then > Use the GUI map correlation. > It will give you the map correlation residue for residue ( or section > by section..).. > But remember to move the second set of coordinates by the same origin > shift applied to the phases.. > E Dear Eleanor, I only have one set of coordinates. There is no origin problem. What I am after is a "mobile" loop in the structure for which there is density (not that good, obviously) in the 2 maps. And I want to know in an objective fashion which of the 2 maps has the "best" or "most informative" density (not trusting my eyes only). Hard numbers (which can be quoted in a publication for example). So I have these now. Thanks anyway for the advice. Fred.