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三维地理场景下带引线点要素注记优化配置的Beams移位方法

Optimized 3D Point Labeling with Leaders Using the Beams Displacement Method

  • 摘要: 在三维地理场景中, 通过为点要素添加带引线的注记可以显著提高目标的可辨识性. 针对现有启发式引线注记配置方法未能有效利用图面空间且难以顾及注记间相对关系的问题, 提出1种适用于三维地理场景注记配置的Beams移位方法. 首先通过三角网建模注记间空间关系; 然后依据注记间相对关系计算注记受力, 并结合Beams移位方法迭代计算注记新位置; 最后, 探讨了提升注记配置效率的分块处理策略, 并分析了不同邻近图构建策略对配置结果的影响. 实验结果表明, 在自建的船舶定位和兴趣点2个数据集中, 所提方法注记配置结果冲突数量均为0, 且邻近注记间相对方向偏差分别减小了8.53°和1.59°; 同时, 所提方法也能够适应不同类型引线注记的配置需求.

     

    Abstract: In three-dimensional geographical scenes, adding labels with leader lines to point features can significantly improve their visibility. To address the limitations of existing heuristic leader label configuration methods, which fail to effectively utilize the map space and struggle with the relative relationships between labels, we propose a Beams displacement method suitable for label configuration in 3D geographic scenes. First, the spatial relationships between labels are modeled using a triangular graph. Then, the forces on the labels are calculated based on their relative positions, and the new label positions are iteratively computed using the Beams displacement method. Finally, we explore a block-processing strategy to improve label configuration efficiency and analyze the impact of different proximity graph construction strategies on the configuration results. Experimental results show that in the self-constructed ship positioning and point of interest datasets, the proposed method resulted in zero label conflicts, with the relative direction deviations between adjacent labels reduced by 8.53° and 1.59°, respectively. Additionally, the method can adapt to the configuration needs of various types of leader annotations.

     

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