Data Item _em_map.data_type

General

Item name
_em_map.data_type
Category name
em_map
Attribute name
data_type
Required in PDB entries
yes
Used in currrent PDB entries
No

Item Description

The map data_type describes the data structure of the map voxels. (CCP4 map header word 4 MODE) EMDB currently holds MODE=0,1,and 2 maps; the majority are MODE=2. MAPS with MODES other than 2 and 0 may not work in CCP4 programs. MODE = 0: 8 bits, density stored as a signed byte (-128 to 127, ISO/IEC 10967) MODE = 1: 16 bits, density stored as a signed integer (-32768 to 32767, ISO/IEC 10967) MODE = 2: 32 bits, density stored as a floating point number (IEEE 754)

Data Type

Data type code
line
Data type detail
char item types / multi-word items ...
Primitive data type code
char
Regular expression
[][ \t_(),.;:"&<>/\{}'`~!@#$%?+=*A-Za-z0-9|^-]*

Controlled Vocabulary

Allowed Value Details
Image stored as floating point number (4 bytes)
Image stored as signed byte
Image stored as signed integer (2 bytes)

Controlled Vocabulary at Deposition

Allowed Value Details
Image stored as floating point number (4 bytes)
Image stored as signed byte
Image stored as signed integer (2 bytes)