= Heliographic Frame = A frame effectively represents a snapshot of some appreciable part of the visible disk at a particular time. All or part of a solar magnetogram remapped to standard heliographic coordinates defines a heliographic frame. The heliographic frame is a subset of a complete SynchronicMap, i.e., ''Synoptic Frame'' or ''Synchronic Frame'', which is constructed by inserting a heliographic frame into a diachronic or synchronic synoptic chart. A series of [[SynopticMap|synchronic frames]] can be useful for studying the effects of time evolution of the solar magnetic field in a global context.