关键词: 等深线优化；不规则三角网；控制点移动；多边形平滑；迭代优化

Abstract: The accuracy and readability of underwater isobath maps are of great significance for hydrological management, water conservancy projects, and navigation safety construction. Aiming at the problems of insufficient accuracy, unrealistic compilation effects, and heavy manual editing workload in existing isobath generation methods, a new isobath optimization editing method is proposed. This method constructs an initial isobath through linear interpolation to build a triangular network, and performs iterative optimization by combining control point movement and polygon smoothing technology to achieve automatic smoothing of isobaths. Experimental results show that the method exhibits good adaptability under different scales and complex terrain conditions. The optimized isobaths are smoother and more fluid, effectively avoiding jagged and irregular protrusions while strictly maintaining the positions of underwater topographic feature points. Compared with traditional isobath optimization software, this method significantly shortens the processing time from raw water depth data import to final isobath generation, significantly improving the quality and efficiency of isobath editing and optimization, and providing reliable technical support for underwater surveys and water conservancy project planning. The research results have practical significance in improving the accuracy and smoothness of underwater terrain representation.

Key words: isobath optimization; irregular triangular network; control point movement; polygon smoothing; iterative optimization