Abstract: A digital plotting system for displaying straight line information. This tem employs a long vector to describe a long straight line on a graph that starts from any point, extends in any direction and has a specific length. The direction is implemented by an eight 45.degree. quadrant system wherein the specific angle within a particular quadrant is derived from binary slope storage and rate generator devices and is referenced from either a vertical adjacent line or a horizontal adjacent line. The long vector logic is compatible for use with a digital plotting system for displaying all forms of graphic information including curved lines, straight lines and characters.

Abstract: A digital plotting system for displaying curved line information. This sym employs short vector information that provides an incremental trace of a curve that is defined by a variable exception vector that is dependent upon trend and exception vectors represented by ODD and EVEN bits described as binary 1's or 0's. When the bit is a binary 0, for example, the vector, whether ODD or EVEN, will continue in the same direction as the immediately preceding vector. However, when the bit is a binary 1 then the vector will change its direction clockwise 45.degree. when EVEN and counterclockwise 45.degree. when ODD, with respect to the immediately preceding vector. The short vector logic is compatible for use with a digital plotting system for displaying all forms of graphic information including curved lines, straight lines and characters.

Abstract: A digital plotting system that receives and stores coded signals depicting raphic information for processing and display. The system processes three basic types of information which are short vector information, long vector information and character information. Together these three types of information can reproduce virtually any type of graphic information that is desired to be transmitted and displayed. The short vector information describes curved lines, the long vector information describes straight lines and the character information describes alphanumerics and symbols. The system employs effective data compaction techniques resulting in a substantial reduction of processed data as compared to facsimile processing.The system automatically stores and provides for sequential selection of the short vector, long vector and alphanumeric information for presentation.

Abstract: A digital plotting system for displaying character information. The charar information includes symbols and alphanumeric information and an individual or group of characters may be presented in sequence from any point on a graph. The logic system describes each symbol within its own preselected retangular coordinate grid system from bottom to top and alternately from left to right and from right to left. At the end of each character definition the logic automatically returns the registers to the starting position for the next character. The character logic is compatible for use with a digital plotting system for displaying all forms of graphic information including curved lines, straight lines and characters.