초록 ▼

A digitized topology data compression and decompression method provides the digitized topology data of a collection of segments connected to each other via nodes. The method forms at least one composite line representing a chain of connected segments, which reduces an overall number of lines needed

A digitized topology data compression and decompression method provides the digitized topology data of a collection of segments connected to each other via nodes. The method forms at least one composite line representing a chain of connected segments, which reduces an overall number of lines needed to represent the collection of segments and where each composite line has two end points at known coordinates, resulting in compression of the topology data. The method further represents each composite line by its respective end point coordinates. Next, the method enrolls each composite line into one of at least two sets of composite lines for minimizing a number of intersections between each of the composite lines within each of the sets of composite lines. Finally, the method reconstructs the nodes at a decompression time by calculating coordinates of intersecting composite lines belonging to different sets of composite lines.

대표청구항 ▼

[ What is claimed is:] [1.] A digitized topology data compression and decompression method comprising the steps of:providing the digitized topology data of a collection of a plurality of segments connected to each other via nodes wherein each node connects one of at least two adjacent segments and a

[ What is claimed is:] [1.] A digitized topology data compression and decompression method comprising the steps of:providing the digitized topology data of a collection of a plurality of segments connected to each other via nodes wherein each node connects one of at least two adjacent segments and an end of one segment;forming at least one composite line representing a chain of connected segments, thereby reducing an overall number of lines needed to represent the collection of segments wherein each composite line has two end points at known coordinates, thereby compressing the topology data;representing each composite line by its respective end point coordinates;enrolling each composite line into one of at least two sets of composite lines for minimizing a number of intersections between each of the composite lines within each of the sets of composite lines; andreconstructing the nodes at a decompression time by calculating coordinates of intersecting composite lines belonging to different sets of composite lines, thereby decompressing the topology data.