A fast quadtree‐based terrain crack locating method that accounts for adjacency relationships

Li Chengming; Zhao Zhanjie; Sun Wei; Liu Zhendong

摘要

Abstract >The repair of terrain cracks is an important process in multi‐resolution three‐dimensional terrain visualization, and rapid and accurate pinpointing of cracks between terrain blocks is of the utmost importance for this process. The existing quadtree‐based crack locating methods are generally slow and inefficient, as they require the traversal of terrain quadtrees to locate terrain cracks. In this research, we propose a fast quadtree‐based terrain crack locating method that accounts for adjacency information. First, terrain quadtrees are constructed that contain information regarding adjacency relationships. Second, dynamic updating is performed for terrain quadtrees and their adjacency information. Finally, terrain cracks are located by using the adjacencies of the quadtree nodes. This proposed method was experimentally validated via the terrain data of a mountainous region in Sichuan Province. The experimental results indicate that the proposed method can be used to efficiently and accurately locate terrain cracks with a strong performance in practical applications. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><abstract type=“main”xml:id=“tgis12578-abs-0001”xml:lang=“en”><title type=“main”>abstract>在多分辨率三维地形可视化中，地形裂缝的修复是一个重要的过程，快速准确地定位地形块之间的裂缝对该过程至关重要。现有的基于四叉树的裂缝定位方法通常速度慢且效率低，因为它们需要遍历地形四叉树来定位地形裂缝。在这项研究中，我们提出了一种基于四叉树的快速地形裂缝定位方法，该方法考虑了相邻信息。首先，构建包含邻接关系信息的地形四叉树。其次，对地形四叉树及其邻接信息进行动态更新。最后，利用四叉树节点的邻接关系来定位地形裂缝。该方法通过四川省山区的地形数据进行了实验验证。实验结果表明，该方法能够高效、准确地定位地形裂缝，在实际应用中具有很强的性能 </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-31674/'>《Transactions in GIS: TG》</a> <b style="margin: 0 2px;">|</b><span>2019年第6期</span><b style="margin: 0 2px;">|</b><span>共19页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Chengming&option=202" target="_blank" rel="nofollow">Li Chengming;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhao Zhanjie&option=202" target="_blank" rel="nofollow">Zhao Zhanjie;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Sun Wei&option=202" target="_blank" rel="nofollow">Sun Wei;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Zhendong&option=202" target="_blank" rel="nofollow">Liu Zhendong;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Chinese Academy of Surveying and MappingBeijing China;</p> <p>Chinese Academy of Surveying and MappingBeijing China;</p> <p>College of GeomaticsShandong University of Science and TechnologyQingdao China;</p> <p>Chinese Academy of Surveying and MappingBeijing China;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/4940.html" title="测绘数据库与信息系统">测绘数据库与信息系统;</a></span> </li> <li 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break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：电子交易处理方法，涉及将数字代码从搜索到的数据集中传输到现金设备，并根据交易参数按设备加载对应于账户关系数据的账户关系。 </span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130416713318.html">TERRAIN ANALYSIS METHOD BASED ON GRID MAP USING QUADTREE</a> <b>[P]</b> . <span> 外国专利：  KR101376687B1 </span> <span> . 2014-03-20</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：基于四元图的网格图地形分析方法 </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 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