Abstract: Based on the demand for GIS graphic aesthetic technology, the urgent demand for GIS graphic aesthetics technology has always existed among planners. This article applies the buffer skeleton line extraction technology based on Tyson polygon to the distribution network GIS map and proposes a distribution network GIS map beautification algorithm based on Tyson polygon. Firstly, several feeders with similar distances are merged into a whole through buffering processing to obtain an envelope buffer zone. Using Tyson polygon, the center line of the buffer zone and the specific feeder section contained in each“corridor”are obtained. The connection relationship between the upper and lower line segments of the whole feeder is obtained by the“forward and backward”method.Finally the relevant distribution equipment and switching equipment are connected to their feeder segments, that is, the beautification of the whole feeder is completed.This algorithm solves the technical difficulty of beautifying the single line diagram of the distribution network GIS, and can be used for planning and compiling the geographical wiring diagram of the distribution network after program automation processing.

Key words: Tyson polygon, skeleton line, GIS single line diagram, envelope line, buffer