The Graphics Medium Presentation Space; The Graphics X And Y Coordinate System; The Graphics Medium Presentation Space And Its Limits - IBM 6400 Programmer's Reference Manual

Graphics Command Set
All coordinates are in coordinate units, called drawing units that are the same as
units in the Graphics Data Descriptor (GDD) structured fields. Figure 12 shows

the Graphics X and Y coordinate system.

Figure 12. The Graphics X and Y Coordinate System

The Graphics Medium Presentation Space

The graphics medium presentation space is an abstract coordinate space where
graphics are composed. It is a conceptual structure defined by the limits of the
coordinate space as shown in Figure 13. Units are defined in "Graphics Data
Descriptor (GDD)" on page 87.
Figure 13. The Graphics Medium Presentation Space and Its Limits
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6400 IPDS
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