[phenixbb] Map quality
murpholinox at gmail.com
Sat May 16 12:28:06 PDT 2015
So...Is there a tool/program/formula to get equivalent sigma levels between
maps so they can be compared?
2015-05-15 11:37 GMT-05:00 Pavel Afonine <pafonine at lbl.gov>:
> Hi Mohamed,
> this is not a simple topic.. Two texts I suggest to have a look at are
> listed below I'm sure there are more). They may not give you a quick
> solution but perhaps will explain the issues.
> Acta Cryst. (2014). D70, 2593-2606
> Metrics for comparison of crystallographic maps
> Acta Cryst. (2015). D71, 646-666.
> FEM: feature-enhanced map
> In a very nutshell,
> - "1 sigma (or any other x sigma) level for one map may not be the same as
> 1 sigma (or any other x sigma) level for another map";
> - Think of "global vs local". Somehow you need to quantify map quality
> - Map correlation (RSCC or map CC, for alternative names) may be a
> misleading metric is used without care: for example, two poor but similar
> map may give you high CC.
> All the best,
> On 5/15/15 9:10 AM, mohamed noor wrote:
>> Dear all
>> Is there a single (or a few) metrics that can be used to quantitatively
>> assess map quality instead of looking at each one in Coot? For example, I
>> want to compare the effect of having low completeness in the low resolution
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