Redbook Format
Redbook format is broken into general purpose blocks. Each block is defined as follows:
Halfword  Content  Description  

0  LCllllllllll...  L  length flag  0 if length included C  Checksum flag  0 if checksum included llll...  length field  14 bit length in halfwords (2 bytes) 

1  mode  submode  Mode and submode values that define block type 
2nnn  Data  
nnn  Checksum 
These blocks are repeated until end of product
1. Product Data
1.1 Product Identification Block (mode 1, submode 1)
Halfword  Content  Description  

1  1  1  Mode and submode 
2  C1  C2  Originator identification (4 characters) 
3  C3  C4  
4  Classification  Retention time  Classification  U  unclassified C  confidential S  secret T  top secret E  encrypted Retention time  default time in days to retain product 
5  File indicator  C2  File indicator determines originating agency 
6  C3  C4  Product identifier C2C10  used to determine type of data 
7  C5  C6  
8  C7  C8  
9  C9  C10  
10  Year  
11  Month  Day  
12  Hour  Minute  
13  C11  C12  Additional product identifier 
14  C13  C14  
15  C15  C16 
1.2 End of Product Block (mode 1, submode 2)
Halfword  Content  Description  

1  1  2  Mode and submode 
1.4 Plot Parameters Block (mode 1, submode 4)
This defines various plotting parameters. Not all parameters need to be specified.
Halfword  Content  Description  

1  1  4  Mode and submode 
2  Z threshold  zoom factor  Z  zoom disable: 0  data are sized according to zoom 1  data are displayed invariant of zoom threshold  minimum zoom factor needed to
display data factor  optional zoom factor applied to strings at local level 
3  plot color  background color  Color index values 
4  line char  line width  line char: 0  continuous 1  dotted 2  short dashed 3  long dashed 4  dotted (every 4th pixel) 5  symbolic line line width  width of line in pixels 
5  C1  C2  Line mneumonic (4 characters) 
6  C3  C4  
7  logical fill  fill pattern  logical fill  Flag indicating whether fill is to be done on
the "L" left or "R" of vector string fill pattern  A preassigned pattern number 
2. Systems Data
These are user defined fields.
3. Formatted Binary Data
4. Vector Graphics Data
These blocks are used with vector graphics plots.
4.16 Vector Graphics Definition Block (mode 4, submode 16)
Halfword  Content  Description  

1  4  16  Mode and submode values 
2  PI set  coord flag  PI  projection indicator  defines the background projection coord
flag: 
3  area code  label code  area code  defines the reference points label code: 
4  M1  First reference coordinate (M,N), defined by area code  
5  N1  
6  M2  Second reference coordinate (M,N)  
7  N2  
8  M3  Third reference coordinate (M,N)  
9  N3  
10  Month  Day  Valid Time 
11  Hour  Minute  
12  Month  Day  End of valid period 
13  Hour  Minute 
Projection Indicators:
The projection is a grid that is defined by a scale (distance between gridpoints) and a lower left corner position (X0,Y0).
PI  Description  Projection  LongX  Scale  X0  Y0 

21  Northern Hemisphere  Polar Stereographic  105W  .0508  61.5  83.7 
22  North America  Polar Stereographic  105W  .1016  103  86 
Area Codes:
11  One reference point is used to define the upper left corner of the product
12  One reference point is used to define the lower left corner of the product
13  One reference point is used to define the center of the product
21  Two reference points are used to define the upper left and upper right corners of the
product
22  Two reference points are used to define the lower left and upper right corners of the
product
23  Two reference points are used to define the upper left and center of the product
24  Two reference points are used. The first reference point gives the coordinates of the
lower left corner of the product in units of the grid from which it was extracted.
The second set of reference coordinates will give the maximum horizontal and
maximum vertical size of the product in pixels.
25  Same as 25 except the reference point is located at the center of the product.
33  Three reference points are used to define the upper left, upper right, and lower
right corners of the product.
4.1 Absolute Vectors Block (mode 4, submode 1)
Halfword  Content  Description  

1  4  1  Mode and submode values 
2  M0  First coordinate (M,N) of the line  
3  N0  
4  B M1  B  beam flag: 0  pen up, new line starts 1  pen down, line drawn to previous point Second coordinate (M,N) 

5  N1  
6nnn  Mx,Nx  Successive coordinates 
4.2 Relative Vectors Block (mode 4, submode 2)
Halfword  Content  Description  

1  4  2  Mode and submode values 
2  M0  First coordinate (M,N) of the line  
3  N0  
4  dM1  dN1  Delta M,N values. Successive values are added to previous values. The delta values are in two's complement. 
5nnn  dMx  dNx  Successive delta values. 
4.5 Long/Short Relative Vectors Block (mode 4, submode 5)
This is similar to the relative vector block except that it allows deltas to be either a long or short value. The long deltas are 2 halfwords and the short deltas are 1 halfword.
Halfword  Content  Description  

1  4  5  Mode and submode values 
2  M0  First coordinate (M,N) of the line  
3  N0  
4  1 dM1  B dN1  1  denotes short delta values. dM1  7 bit delta M (two's complement). B  beam mode: 0  pen up, new line, 1  pen down draw from previous point dN1  7 bit delta N (two's complement) Delta M,N values. Successive values are added to previous values. The delta values are in two's complement. 
4  0xx dM1  0xx  denotes long delta values. dM1  15 bit delta M (two's complement) 

5  0xB dN1  B  beam mode: 0  pen up, new line, 1  pen down
draw from previous point dN1  15 bit delta M (two's complement) 

5nnn  Successive delta values. 
4.10 Curve Vectors Block (mode 4, submode 10)
This specifies a list of point to which a smooth curve is to be fitted. There is a minimum of three points.
Halfword  Content  Description  

1  4  10  Mode and submode values 
2  M0  First coordinate (M,N) of the line  
3  N0  
4  B M1  B  beam flag: 0  pen up, new line starts 1  pen down, line drawn to previous point Second coordinate (M,N) 

5  N1  
6  B M2  Third coordinate (M,N)  
7  N2  
8nnn  Mx,Nx  Successive coordinates 
5. Alphanumeric Data
5.16 Alpanumeric Product Definition Block (mode 5, submode 16)
Halfword  Content  Description  

1  5  16  Mode and submode values 
2nnn  C1  C2  Character data. Number of characters defined by block length. 
5.1 Alphanumeric Character Block (mode 5, submode 1)
Halfword  Content  Description  

1  5  1  Mode and submode values 
2  M  Position (M,N) of the string  
3  N  
4  dM  dN  Delta M,N values identify offset from position for the first character in the string. This is fixed regardless of zoom factor. 
5  B R size  C1  B  Block mode: 0  display normally (except with R=1) 1  rectangular block is cleared prior to plotting text. R  Reverse mode: size  Character size factor in display units: 0 = standard size, 1 = 5x7, 2 = 10x14, 3 = 15x21, etc. C1  Start of character data. 
6nnn  C2  C3  Additional character data. Number of characters defined by block length. 
5.2 Plot Data Block (mode 5, submode 2)
The plot data block plots data based on a process code. This can define strings or symbols to be plotted. In the case of symbols, the process code defines the number of characters needed to define the symbol. More than one can be plotted.
Halfword  Content  Description  

1  5  2  Mode and submode values 
2  B R size  code  B  Block mode: 0  display normally (except with R=1) 1  rectangular block is cleared prior to plotting text. R  Reverse mode: size  Character size factor in display units: 0 = standard size, 1 = 5x7, 2 = 10x14, 3 = 15x21, etc. code  Plot process code 
3  M  Position (M,N) of the string  
4  N  
5  C1  C2  Characters to be plotted based on process code. 
6  C3  C4  
7xxx  Cx  Cx  
xxx+1  M  Position (M,N) of the next string  
xxx+2  N  
xxx+3  C1  C2  Characters to be plotted based on process code. 
xxx+4  C3  C4  
xxx+5yyy  Cx  Cx 
Process Codes:
0  Character data. M,N is lower left corner of first character.
1  Weather symbols. Each symbol is determined from a 4 character mneumonic.
M,N is the lower left corner of the symbol.
2 