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2015 23rd International Conference on Geoinformatics最新文献

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Morphology-Ontology of geospatial data and its application in data discovery 地理空间数据的形态本体及其在数据发现中的应用
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378640
Kai Sun, Yunqiang Zhu, Peng Pan, Kan Luo, Dongxu Wang, Zhiwei Hou
Semantic heterogeneity of geospatial data is the main bottleneck for implementing linked data, intelligent recommendation and accurate discovery of data. The ontology theory is an effective way to solve the semantic heterogeneity of data. Morphological Characteristics is the important research content of Semantic heterogeneity of data. This paper mainly studies morphological characteristics of geospatial data, analyzes its concept, attribute, and relation, and puts forward its concepts system. On this basis, this paper builds the model of Morphology-Ontology of geospatial data and defines the method of formalization representation of morphological information. In the last part, this paper constructs Morphology-Ontology and applies it to the retrieval of metadata of the Data Sharing Infrastructure of Earth System Science. Verification tests show that Morphology-Ontology of geospatial data can solve the semantic heterogeneity of data effectively and improve the precision and recall of the result of data discovery significantly. The research methods and results of this paper are of great reference value to solve the semantic heterogeneity of data in other fields.
地理空间数据的语义异构性是实现关联数据、智能推荐和准确发现数据的主要瓶颈。本体理论是解决数据语义异构的有效途径。形态特征是数据语义异质性研究的重要内容。本文主要研究地理空间数据的形态特征,分析地理空间数据的概念、属性和关系,提出地理空间数据的概念体系。在此基础上,建立了地理空间数据的形态本体模型,定义了形态信息的形式化表示方法。最后,本文构建了形态本体,并将其应用于地球系统科学数据共享基础设施的元数据检索。验证实验表明,地理空间数据的形态学本体能够有效地解决数据的语义异构问题,显著提高数据发现结果的查全率和查全率。本文的研究方法和成果对解决其他领域数据语义异构问题具有重要的参考价值。
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引用次数: 1
A WebGIS-based monitoring and early-warning system for geological disasters 基于webgis的地质灾害监测预警系统
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378718
Haiquan Yang, Dingtao Shen, Huang Huang
This paper focuses on studies of Danjiangkou Reservoir and its neighboring areas. This region is geographically important, but the frequent occurrence of geological disasters has severely threatened the security of people living in the area, as well as the Middle Route Project for the diversion of water from south to north China. We reconstruct this area with a WebGIS-based three-dimensional (3D) real-time monitoring and early-warning system for geological disasters. This paper introduces the system's overall design, including data collection, database construction, system structure, and software function design, as well as the system's early-warning mechanism and relevant disaster prediction methods. Data storage is split into spatial and attribute databases. These combine real-time results received by sensors in the disaster zone, including transmitted data, natural geographical data, meteorological data, aerial photo and satellite data, and manual observation data. With a Browser/Server structure-based design, the 3D functionality of the system is implemented on the TerraGate platform. The proposed system is an effective disaster prediction model, and can successfully realize real-time monitoring and early-warnings of geological disasters in the area.
本文以丹江口水库及其周边地区为研究对象。该地区地理位置重要,但频繁发生的地质灾害严重威胁着该地区人民的安全,也严重威胁着南水北调中线工程的安全。利用基于webgis的三维地质灾害实时监测预警系统对该地区进行了重建。本文介绍了系统的总体设计,包括数据采集、数据库建设、系统结构、软件功能设计,以及系统的预警机制和相关的灾害预测方法。数据存储分为空间数据库和属性数据库。这些综合了灾区传感器接收到的实时结果,包括传输数据、自然地理数据、气象数据、航空照片和卫星数据以及人工观测数据。采用基于浏览器/服务器结构的设计,系统的3D功能在TerraGate平台上实现。该系统是一种有效的灾害预测模型,能够成功地实现该地区地质灾害的实时监测和预警。
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引用次数: 3
An extensible simulation framework for diagnosing the execution of the distributed geospatial web services 用于诊断分布式地理空间web服务执行的可扩展模拟框架
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378672
Binbin Xiang, Xu Li, Min Zhang, Lifei Lu, Fa Li, Binru Zhao, Zhipeng Gui
Distributed geospatial web services have been widely utilized in scientific researches, public web applications and emergency responses. However, due to the high cost and limitation of reality for these potential applications, it is necessary to diagnose the execution of the distributed geospatial web services before applying them in real-world. In this article, we introduce an extensible framework that provides the users with the capacity to simulate the execution of distributed geospatial web services. Specifically, it can simulate the task arrival, computing resource usage, execution status, as well as execution results of geospatial web services. It also provides the statistics and evaluation function of the results of execution. The proposed simulation framework can be divided into three modules, i.e., a web Graphic User Interface (GUI), a simulator, and a database. The GUI is in charge of the interaction functions for specifying simulation parameters and visualizing the execution status dynamically. The simulator module provides a flexible mechanism to integrate a variety of simulation features by using a simulator coordinator. The database is for storing the real-time status and historical simulation data. The experiment demonstrates that the proposed framework can 1) facilitate the evaluation of the performance and reliability of the web service in advance, 2) help users find the critical path and the bottleneck of the processing workflow, and 3) provide useful information for further improvement in the performance and for dealing with the unexpected events.
分布式地理空间网络服务已广泛应用于科学研究、公共网络应用和应急响应等领域。然而,由于这些潜在应用程序的高成本和现实限制,有必要在实际应用分布式地理空间web服务之前对其执行进行诊断。在本文中,我们将介绍一个可扩展框架,它为用户提供模拟分布式地理空间web服务执行的能力。具体来说,它可以模拟地理空间web服务的任务到达、计算资源使用、执行状态以及执行结果。它还提供了执行结果的统计和评价功能。所提出的仿真框架可分为三个模块,即web图形用户界面(GUI)、模拟器和数据库。GUI负责指定仿真参数和动态可视化执行状态的交互功能。模拟器模块提供了一种灵活的机制,通过使用模拟器协调器集成各种仿真功能。数据库用于存储实时状态和历史仿真数据。实验表明,该框架能够提前评估web服务的性能和可靠性,能够帮助用户找到处理工作流的关键路径和瓶颈,能够为进一步提高性能和处理突发事件提供有用的信息。
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引用次数: 0
Impact of urbanization on stream structure and flood hazard in the plain river network region 城市化对平原河网地区水系结构及洪涝灾害的影响
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378649
F. Zhou, Huihua Lv, Youpeng Xu
Urbanization is one of the most intensive processes of human activities which have changed the earth's surface, and is also one of the important factors influencing the hydrologic process. Base on the high resolution image and topographic map, this paper conducts a case study on the flood response to river system change under urbanization in a typical plain river network region of Fenghuajiang River basin. The result showed that the proportion of urban area was increased from 13.2% to 34.1% during the past 20 years, which was mainly gained from cropland and water bodies; the increase of impervious surface tended to produce more surface runoff, and also decrease the drainage density and water surface rates. The submerge simulation showed that the decreasing in storage capacity would cause higher stage and cause more serious risk especially for suburban region with lower elevation in all designed storm scenarios, and the response was most pronounced for a recurrence intervals equaling to 20 years. The research has rich theoretical research on stream structure in plain area, and provides decision-making and reference for flood management in the study area.
城市化是人类活动最密集的改变地球表面的过程之一,也是影响水文过程的重要因素之一。基于高分辨率影像和地形图,以典型的丰花江流域平原河网区为例,对城市化条件下水系变化的洪水响应进行了研究。结果表明:近20年来,城市面积占比由13.2%增加到34.1%,主要来源于农田和水体;不透水面积的增加使地表径流量增加,并使排水密度和地表流速降低。淹没模拟结果表明,在所有设计的暴雨情景中,库容的减少会导致水位升高,特别是对海拔较低的城郊地区造成更严重的风险,并且在20年的重复周期内反应最为明显。本研究对平原区水系结构进行了丰富的理论研究,为研究区洪水治理提供决策和参考。
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引用次数: 0
The information extraction and potential analysis of field based on high-precision DEMs 基于高精度dem的野外信息提取与潜力分析
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378573
Zaigui Yang, Min Lu, Qing Deng, Jian Jia, Huang Huang
With the development of high-resolution remote sensing satellites, the techniques based on high-resolution remote images are widely applied in the extraction of field information. However, these techniques collect information mainly through information of spectrum, texture, and surface features. This paper put forward a field information extraction method based on profiles. Supported by high-precision DEM data, this method starts with discrete elevations and conducts analysis on profiles in many directions. It finds out the farmland in a testing area by firstly marking the straight line on a profile as farmland and others as non-farmland and then taking the classifications of fields into overall consideration. It has been proven in the test that, with the increase of precision of DEM data, the method is both feasible and promising.
随着高分辨率遥感卫星的发展,基于高分辨率遥感影像的野外信息提取技术得到了广泛的应用。然而,这些技术主要通过光谱信息、纹理信息和表面特征信息来收集信息。提出了一种基于剖面的油田信息提取方法。该方法以高精度DEM数据为支撑,从离散高程出发,从多个方向对剖面进行分析。首先将剖面上的直线标记为农田,将其他直线标记为非农田,然后综合考虑农田的分类,从而确定测试区内的农田。试验证明,随着DEM数据精度的提高,该方法是可行的,具有广阔的应用前景。
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引用次数: 0
The county-level assessment on risk of collapses, landslides, and debris flows in Guangdong using GIS and remote sensing 基于GIS和遥感的广东省崩落、滑坡和泥石流县级风险评估
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378557
Feng Dongning, Wu Mengfan, Yin Hui, Wang Yunpeng, Dai Xuejun
Based on Excel and ArcGIS10.0 software package, this paper uses spatial overlay statistics and correlation analysis to study the risk of collapses, landslides, and debris flow hazards in every county of Guangdong, including their danger and vulnerability. The results are shown as follows; Firstly, terrain and precipitation are major factors in risk assessment of geological hazard in Guangdong. Within this, the maximum relative elevation is the restricting factor in danger degree of hazards. The major factor is from terrain to precipitation, when the maximum relative elevation is near 1200m. Secondly, high strong and short duration precipitation exerts more effect on the danger of hazards than average annual precipitation of long period and zonal. Thirdly, By analyzing the socio-economic data of every county, the study assess the vulnerability and risk degree of every county and proofs the major factor on the evaluation of hazards risk is the intensity of human activities.
本文基于Excel和ArcGIS10.0软件包,采用空间叠加统计和相关分析的方法,对广东省各县的崩塌、滑坡和泥石流灾害风险进行了研究,包括其危险性和脆弱性。结果如下:首先,地形和降水是广东地质灾害风险评价的主要因素。其中,最大相对海拔是危险程度的制约因素。当最大相对海拔在1200m附近时,主要受地形和降水的影响。②高强度短持续降水对灾害危险性的影响大于长周期、纬向年平均降水。第三,通过对县域社会经济数据的分析,对县域的脆弱性和风险程度进行了评价,证明了人类活动强度是影响灾害风险评价的主要因素。
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引用次数: 1
Technical evaluation for mashing up crowdsourcing images 众包图像混搭技术评价
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378684
Caodong Xie, Zhiehao Zhang, J. Shan
The popularity of smart mobile devices with camera enabled results in a growing number of photos on the Internet. Those with semantic and geographic data can be used to enrich the data source of geographic information system, whereas, the widespread sources of these photos make them difficult to retrieve and utilize. We use a third-party image search APIs to retrieve the images dynamically and use both keywords and geographic coordinates as queries to implement the mashup service of searching multi-source POIs and web images. We also designed an efficient schema of storing and managing images uploaded from mobile deuce with rich metadata. We developed a prototype framework of searching and managing crowdsourcing images and verified its feasibility.
随着带摄像头的智能移动设备的普及,互联网上的照片越来越多。具有语义和地理数据的照片可以丰富地理信息系统的数据源,但这些照片来源广泛,检索和利用难度较大。我们使用第三方图像搜索api动态检索图像,并使用关键字和地理坐标作为查询来实现搜索多源poi和web图像的mashup服务。我们还设计了一个高效的模式,用于存储和管理从具有丰富元数据的移动设备上传的图像。我们开发了一个搜索和管理众包图像的原型框架,并验证了其可行性。
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引用次数: 2
Object-oriented method of building damage extraction from high-resolution images 面向对象的高分辨率图像中建筑物损伤提取方法
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378622
L. Wang, Jinping Li, Yaohui Liu, T. Gan
Building damage information is an important basis of earthquake disaster loss assessment, it is also one of judgement index of earthquake intensity. In the process of using remote sensing image for earthquake disaster information acquisition and earthquake emergency rescue, building damage information extraction technique is the key to get accurate disaster information. In this paper, based on the object-oriented and pixel-based method, we extract building earthquake damage information and accuracy evaluation of results. The results show that the object-oriented classification method to extract the feature of results in shape was consistent with the actual situation, and classification accuracy is higher and the effect is better.
建筑震害信息是地震灾害损失评估的重要依据,也是地震烈度的判断指标之一。在利用遥感影像进行地震灾害信息采集和地震应急救援过程中,建筑物损毁信息提取技术是获得准确灾害信息的关键。本文基于面向对象和基于像素的方法,提取建筑物震害信息并对结果进行精度评价。结果表明,采用面向对象的分类方法提取结果的形状特征符合实际情况,分类精度较高,效果较好。
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引用次数: 2
Testing simulated positive spatial autocorrelation by Getis-Ord general G Getis-Ord通用G测试模拟正空间自相关
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378614
Kun Zhang, Songlin Zhang
Getis-Ord general G provides researchers with a straightforward way to assess the degree of spatial association in an entire sample. It measures how concentrated the high or low values are for a given study area. In order to check the ability at detecting global spatial autocorrelation pattern, several clustering arrangements were designed and G values were calculated. The results of the standardized G value and p-value indicate that G index is sensitive to the size of the clustering region as well as the location, a larger size and a near-center location is preferred. The selection of threshold distance will also affect the testing results, sometimes contradictive patterns are reported at different threshold distances in a same study area.
Getis-Ord general G为研究人员提供了一种直接的方法来评估整个样本的空间关联程度。它测量给定研究区域的高值或低值的集中程度。为了检验该方法对全局空间自相关模式的检测能力,设计了几种聚类方式,并计算了G值。标准化G值和p值的结果表明,G指数对聚类区域的大小和位置都很敏感,更大的大小和近中心的位置是首选。阈值距离的选择也会影响测试结果,有时在同一研究区域的不同阈值距离下会出现相互矛盾的模式。
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引用次数: 4
2D and 3D webpage visualization of the great circle and rhumb line 2D和3D网页可视化的大圆和横线
Pub Date : 2015-06-19 DOI: 10.1109/GEOINFORMATICS.2015.7378611
Qin Zhang, Kun Zhang
The great circle route and rhumb line are two important spherical curves. The characteristic of the former curve could be best understood on a sphere, while the characteristic of the latter is fully expressed on a projected map, which is Mercator's projection. This paper utilized electronic map APIs and web3D techniques to provide an interactive webpage to display 2D and 3D views. A projected Mercator world map is displayed in 2D view, and a virtual globe is displayed in 3D view. The great circle route and rhumb line are visually compared in multi-dimensional environment. The technique demonstrated in this paper provides a convenient way to understand the great circle route and rhumb line, and is especially useful in education.
大圆路线和横线是两条重要的球面曲线。前一种曲线的特性在球面上可以得到最好的理解,而后一种曲线的特性则在投影图上得到充分的表达,这就是墨卡托投影。本文利用电子地图api和web3D技术,提供了一个显示二维和三维视图的交互式网页。投影墨卡托世界地图以2D视图显示,虚拟地球仪以3D视图显示。在多维环境中对大圆路线和横线进行视觉对比。本文所演示的技术为理解大圆路线和人行横道提供了一种方便的方法,在教育中尤其有用。
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引用次数: 0
期刊
2015 23rd International Conference on Geoinformatics
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