Hi, those formats are not intended to be readable other than by the
format exchange programs, and I would strongly advise against trying!
Instead, pretty well all programs read a CCP4 binary map directly and
do whatever they need to with the map array in memory. The
documentation for the Fortran API is in your $CDOC/maplib.doc and for
the C++ API at (among others)
http://www.ysbl.york.ac.uk/~cowtan/clipper/doc/p_develop_map.html .
If you're really desperate you could probably hack it with the output
from mapdump, though again that format was designed only for printing
(in the days of the dim & distant past when we contoured map sections
by hand!), not for machine processing.
Cheers
-- Ian
On Tue, May 25, 2010 at 7:49 PM, Hailiang Zhang <[log in to unmask]> wrote:
> Hi,
>
> I wanted to convert a binary ccp4 map file to a readable format so that I
> can retrieve the electron density at each real space grid point. Just
> tried MAPTONA4 and MAPEXCHANGE, but the resulting ascii file are not
> readable, and I didn't find any documentataion about how to read them.
> Could somebody give me any hint? Thanks a lot!
>
> Best Regards, Hailiang
>
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