Hi all,

I am trying to cut density from EM map (in a small P1 cell) into big P1 cell
for MR.

The mask is defined by a certain cut-off level in mapmask :

mapmask                  \
mapin   em.map         \
mskout em.msk << eof
MASK CUT 353
MODE mapin
eof

I use maprot to cut the density to the big P1 (that has the same grid
spacing as the original small P1).

maprot wrkin em.map mskin em.msk mapout cut.map << eof
MODE TO
CELL XTAL 1098. 1098. 1098. 90. 90. 90.
GRID XTAL 375 375 375
SYMM P1
AVER 1
ROTA EULER  0.0  0.0  0.0
TRANS  0.0  0.0  0.0
END
eof

When cut.map is read by mapmask  the program reports that the minimum of the
map is  -310.

How come the minimum is not the cut-off level used to define the mask ? What
am I missing/Doing wrong ?

Many thanks in advance for all suggestions and comments,

Peter.

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