File Formats
...under construction...
CCP4, MRC, and variants
byte\ word\ word\ field type description [CCP4](http://www.ccp4.ac.uk/html/maplib.html#description) [MRC](http://www2.mrc-lmb.cam.ac.uk/research/locally-developed-software/image-processing-software/#image) [MRC-IMOD](http://bio3d.colorado.edu/imod/doc/mrc_format.txt)
offset offset\ index\
(first=0) (first=1)
0 0 1 N ~x~ int32 3-D size of data array,\
fastest changing first
4 1 2 N ~y~ int32
8 2 3 N ~z~ int32
12 3 4 mode int32 data type:\ additionally:\ additionally:
0: signed 8-bit integer\ 5: same as mode 0 6: 16-bit unsigned integer
1: signed 16-bit integer\ 16: 3x8-bit unsigned int, RGB
2: 32-bit float\ NOTE: mode 0 may be signed
3: 16-bit complex integer\ or unsigned depending
4: 32-bit complex float on codes found at byte
offset 152 and 156
16 4 5 Start ~x~ int32 number of the first element\
in each dimension, if this\
is a sub-array of another
20 5 6 Start ~y~ int32
24 6 7 Start ~z~ int32
28 7 8 Intervals ~x~ int32 number of grid intervals\
along each dimension
32 8 9 Intervals ~y~ int32
36 9 10 Intervals ~z~ int32
40 10 11 Cell Length ~x~ float32 cell length in angstrom
44 11 12 Cell Length ~y~ float32
48 12 13 Cell Length ~z~ float32
52 13 14 Cell Angle α float32 cell angles in degrees \2/3. ignored by IMOD
56 14 15 Cell Angle β float32
60 15 16 Cell Angle γ float32
64 16 17 Column axis int32 1 -> X\
2 -> Y\
3 -> Z
68 17 18 Row axis int32
72 18 19 Section axis int32
76 19 20 Minimum density float32 statistics calculated\
from the data
80 20 21 Maximum density float32
84 21 22 Mean density float32
...under construction...