[Chimera-users] Combining 2 electron density maps in 1

[Tom Goddard]

Hi Mazdak,

  Chimera cannot currently merge two maps into a single map.  It can 
only save a single map and allows writing just a zone or a subregion or 
a hand-erased modifications, and allows a new origin, grid spacing, and 
file format.

  We would like to add the ability to merge maps.  Could you explain 
your case?  Do the two maps overlap each other?  How would they be 
combined if they overlap (added)?  Are the grids of the two maps aligned 
so that all grid points of both data sets are part of the same bigger 
grid?  Or would the data need to be interpolated at new grid points to 
make a merged map?

  I have written a script that stacks two copies of a map on top of each 
other and writes a single new map for making filaments twice as long 
where the original map contains a single periodic repeat.

    Tom