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Xiaoqiang Cheng, Zhongyu Liu, Huayi Wu and Haibo Xiao
Taking location-based service (LBS) as the research scenario and aiming at the limitation of visualizing LBS points of interest (POI) in conventional web maps, this article proposes a visualization method of LBS-POI based on tag cloud, which is called ?L...
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Boxiang Zhang, Hongxiang Ren, Shaoyang Qiu, Xiao Yang, Gongming Liao and Xiao Liang
In order to reduce the cost of navigation training in the waters of ice zones and improve the effectiveness of the training process, a method for simulating sea ice fragmentation in an ice zone navigation simulator is proposed. The Voronoi diagram algori...
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Andréas Guitart, Daniel Delahaye and Eric Feron
This paper addresses the generation of aircraft emergency trajectories with obstacle avoidance. After presenting in detail the fast marching tree algorithm, in this paper we propose an improvement of its performance. First, the free space checking functi...
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Yunong Zhang, Anmin Zhang, Miao Gao and Yi Liang
The three-dimensional (3D) visualization of the electronic navigation chart (ENC) can reflect the marine environment and various marine features truly, accurately, and directly, to reduce misoperation during chart use and improve the convenience of using...
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Zebang Liu, Luo Chen, Anran Yang, Mengyu Ma and Jingzhi Cao
In the big data era, rapid visualization of large-scale vector data has become a serious challenge in Geographic Information Science (GIS). To fill the gap, we propose HiIndex, a spatial index that enables real-time and interactive visualization of large...
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Haydn Lawrence, Colin Robertson, Rob Feick and Trisalyn Nelson
Social media and other forms of volunteered geographic information (VGI) are used frequently as a source of fine-grained big data for research. While employing geographically referenced social media data for a wide array of purposes has become commonplac...
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Rong Yang and Baoning Niu
Continuous k nearest neighbor queries over spatial?textual data streams (abbreviated as CkQST) are the core operations of numerous location-based publish/subscribe systems. Such a system is usually subscribed with millions of CkQST and evaluated simultan...
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Zihe Hu, Jing Guo and Xuequan Zhang
Underground pipe network is a critical city infrastructure, which plays an important role in smart city management. As the detailed three-dimensional (3D) scene of underground pipe networks is difficult to construct, and massive numbers of pipe points an...
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Ting Huang, Zhengping Weng, Gang Liu and Zhenwen He
To manage multidimensional point data more efficiently, this paper presents an improvement, called HD-tree, of a previous indexing method, called D-tree. Both structures combine quadtree-like partitioning (using integer shift operations without storing i...
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Pengcheng Shi, Qin Ye and Lingwen Zeng
Herein, we propose a novel indoor structure extraction (ISE) method that can reconstruct an indoor planar structure with a feature structure map (FSM) and enable indoor robot navigation using a navigation structure map (NSM). To construct the FSM, we fir...
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