关键词: 平行线, 数学形态学, 地理信息系统

Abstract: Parallel lines drawing frequently happens in the Geographic Information System (GIS) development. In the traditional drawing algorithms, nodes of parallel lines are in the opposite direction or far away from the polyline when the angle is very small. To solve these two cases, a correction method based on probability theory was proposed. At the same time, mathematical morphology was adopted to correct the results, which made it aesthetic, and made the very sharp angle smooth. The experimental results show that the proposed algorithm is effective.

Key words: parallel line, mathematical morphology, Geographic Information System (GIS)