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人类正从IT时代走向DT时代,诸多的技术手段使大数据处理技术能够从大规模数据中分析出相关模式或趋势,让我们对海量数据的价值挖掘充满了期待.当可视化呈现让大数据的潜力达到最大时,以往未被观察到的现象或趋势很容易被发现,用户能够快速地获得更多信息,发现他们所需要的价值.因此,如何最大化地呈现大数据中隐含的价值变得尤为关键.本文将重点研究空间大数据的可视化方法,充分发挥数据可视化的作用,帮助用户挖掘隐藏在空间大数据中的价值. 相似文献
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地理空间数据正以前所未有的速度不断增长,如何高效地利用、挖掘这些数据中隐藏的信息变得十分必要。本研究利用D3客户端技术,将常用空间数据格式(shp格式数据),进行数据的绑定、投影设置及转换、地理路径设置及地图绘制等,快速高效地实现数据可视化及平滑显示。本文研究结果可以有效解决地图动态交互问题。 相似文献
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滴滴出行数据中包含了丰富的用户位置信息、出行时空属性、用户行为规律与特征,通过对这些信息的深入分析与挖掘,并结合可视化技术,以图形图像的方式展示,有助于分析用户出行的规律.为了直观展示海口市交通流量动态变化,分析车辆出行的时空规律和交通出行路况,设计一个可视化分析系统.以日历图、径向柱状图等可视化方法为依据,结合可视化工具,从出行数据的不同维度着手分析海口市交通流量情况.该系统能够客观地反映海口市交通变化情况,可以为交通管理规划提供合理的依据. 相似文献
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海洋预报信息在海洋管理、国防建设和海洋经济发展等方面有着广泛应用,建设能够实时动态地发布海洋预报信息的数据共享平台具有重要的现实意义。本文首先分析了海洋预报数据管理和可视化方面存在的突出问题;然后,针对这些问题,利用GIS技术对海洋预报数据的管理和可视化方法进行研究,分别基于混合结构数据模型管理预报数据,以矢量图、栅格图、统计折线图等方式对预报数据进行可视化;最后,基于WebGIS、ArcGIS API for JavaScript技术进行了海洋预报信息发布系统的开发实践,实现了海洋预报数据的科学管理和动态可视化。 相似文献
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基于ArcGIS Flex API的电网企业信息可视化系统研究 总被引：3，自引：0，他引：3
随着电网企业信息量不断地增多,用户对信息的展现形式要求也越来越丰富,研究一种新型的信息可视化展现是很有必要的。本文采用了Flex技术和ArcGIS技术,开发的系统主要面向企业中高层领导,系统具有很强的用户体验,将电网企业原有的XI和BW系统数据和地理信息数据集成起来显示,是一种新的尝试,使得用户对企业数据的理解通过可视化得到进一步加强。 相似文献
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当今社会正处于一个信息爆炸的时代,随着企业信息化技术的发展,除了政府机构、媒体(传统媒体)、企业等提供越来越多的数据以外,新兴的社会化媒体、物联网技术等的应用普遍化、介入人类生活的深入化也是数据量急剧增长的主要原因.这些数据大多以表格的形式存放在数据库内,既枯燥又难于理解.如何才能将这些数据有效地展示出来,帮助用户理解数据,发现潜在的规律,是亟待解决的问题.数据可视化能够将抽象的数据表示成为可见的图形或图像,显示数据之间的关联、比较、走势关系,有效揭示出数据的变化趋势,从而为理解那些大量复杂的抽象数据信息,为企业决策支持提供帮助.本文把大数据时代作为背景,把统计数据作为一个整体研究对象,将可视化技术和可视化表现作为方法手段,对各自进行分类和研究探讨,从而全面地认识数据可视化. 相似文献
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城市公共管理对地理信息数据有着迫切的需求。本文从如何将海量地理信息与城市公共管理服务相结合入手,分析了目前城市公共管理平台地理信息可视化存在的问题,提出了用面向资源的地理信息服务共享模式,构建了城市公共管理云平台架构,实现了海量多元数据的纵横联通和有效集成。在此基础上通过浏览器端地理信息可视化架构,帮助用户提高视觉注意力,可以更好地为政府决策、社会公益服务等提供有效的地理信息服务支持。从我们建立的湖北省襄阳市城市公共管理平台来看,通过面向资源的一体化可视化技术,能够将城市地理信息数据与公共管理服务相结合,更有利于提高城市公共管理信息可视化的查询效率。 相似文献
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生态环境综合信息图谱的多维动态可视化研究 总被引：1，自引：0，他引：1
多维与动态可视化技术是地学可视化新的发展趋势,地学信息图谱是在计算机技术、GIS技术、可视化技术、虚拟现实技术等支持下为用户提供经过深加工的更高层次的地学信息产品。生态环境综合信息图谱是地学信息图谱研究的一项重要内容,本文结合作者的具体实践深入探讨了利用多维与动态可视化技术来表达和描述地学信息图谱方法和原理。 相似文献
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《制图学和地理信息科学》2013,40(1):49-57
Many cartographers subscribe to the view that unclassed choropleth maps and multivariate choropleth maps exceed map readers' abilities to process visual information. This paper examines recent evidence which controverts both of these beliefs and discusses applications of a computer program, BICHOR, designed to produce unclassed bivariate choropleth maps interactively on a line plotter or CRT. The maps utilize crossed-line symbolism and putatively overcome both the quantization error inherent in conventionally classed choroplethic displays and the perceptual difficulties associated with color-encoding schemes used for earlier bivariate maps. 相似文献
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地形可视化的进展与评述 总被引：1，自引：0，他引：1
地形可视化由于具有越来越广泛的用途,越来越多地引起了大家的关注。在简要论述科学可视化、地形可视化定义及其研究内容的基础上,着重讨论了当前地形可视化的表达手段、可视化建模与技术、可视化生成工具、实时地形生成等方面的研究现状及存在的问题,最后对可视化的应用前景和发展趋势进行了展望。 相似文献
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地形可视化的进展与评述 总被引：4，自引：0，他引：4
地形可视化由于具有越来越广泛的用途，因此越来越多地引起了大家的关注。本文在简要论述科学可视化、地形可视化定义及其研究内容的基础上，着重讨论了当前地形可视化的表达手段、可视化建模与技术、可视化生成工具、实时地形生成等方面的研究现状及存在的问题，最后对可视化的应用前景和发展趋势进行了展望。 相似文献
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This paper describes an ongoing research work on developing methods for effective visualisation support for situation analysis, decision making, and communication in the course of disaster management. The major goals are to reduce the information load of the analyst, decision maker, or information recipient without omission of anything important and to ensure quick and accurate comprehending of the information. The work embraces the issues of selection of the relevant information and defining the appropriate level of detail, data preparation (aggregation and other transformations), and selection of the appropriate methods for visual representation depending on the user's tasks or communication goals, recipient's profile, and the target presentation medium. A practical outcome from the research will be a knowledge base that can be used to support analysis, decision making, and information communication in emergency situations. A great part of the knowledge, specifically, knowledge on data transformation and representation, is generic and can be used for different applications. 相似文献
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在信息与通信技术的推动下, 地图可视化表达呈现出突破创新和拓展泛化的趋势, 然而地图设计与制作过程仍然高度依赖制图者的自然智能和专业经验等主观性因素。为适应信息化时代下地图表达与制作的客观化和自动化需求, 同时推进地图学理论方法研究与新型地图可视化技术的同步发展, 首先基于泛地图可视化维度体系和地图功能体系, 建立表达需求与可视化维度的关联关系;然后分析不同可视化维度类型所对应的典型地图可视化形式, 构建表达需求解析→可视化维度组合→表达形式建立→地图表达的泛地图表达机制。这进一步拓展了地图学研究和实践应用, 助力地图设计、表达和制作逐步走向大众化。 相似文献
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The Integration of Geographic Visualization with Knowledge Discovery in Databases and Geocomputation
《制图学和地理信息科学》2013,40(1):29-44
This paper details the research agenda of the International Cartographic Association Commission on Visualization: Working Group on Database-Visualization Links. The paper stresses the need for the closer integration of three largely disparate technologies: geographic visualization, knowledge discovery in databases, and geocomputation. The introduction explains the meaning behind these terms, the ethos behind their practice, and their connections within the broad realm of knowledge construction activities. The state of the art is then described for different approaches to knowledge construction, concentrating where possible on visual and geographically oriented methods. From these sections, a research agenda is synthesized in the form of three sets of research questions addressing: (1) visual approaches to data mining; (2) visual support for knowledge construction and geocomputation; and (3) databases and data models that must be satisfied to make visually-led knowledge construction a reality in the geographic realm. Conclusions relate this agenda to issues of (1) data, (2) geographic knowledge, and (3) the visualization environment and pose significant challenges to the way we currently represent geographic information and knowledge within computational systems. 相似文献
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《制图学和地理信息科学》2013,40(3):139-160
Developing reliable methods for representing and managing information uncertainty remains a persistent and relevant challenge to GIScience. Information uncertainty is an intricate idea, and recent examinations of this concept have generated many perspectives on its representation and visualization, with perspectives emerging from a wide range of disciplines and application contexts. In this paper, we review and assess progress toward visual tools and methods to help analysts manage and understand information uncertainty. Specifically, we report on efforts to conceptualize uncertainty, decision making with uncertainty, frameworks for representing uncertainty, visual representation and user control of displays of information uncertainty, and evaluative efforts to assess the use and usability of visual displays of uncertainty. We conclude by identifying seven key research challenges in visualizing information uncertainty, particularly as it applies to decision making and analysis. 相似文献
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In its current status, medical imaging involves a wide range of imaging modalities and is faced with a range of interesting research questions, while trying to automatically convert the huge floods of image data to useful information. The major characteristic of the developed techniques is the exploitation of visual similarities or differences; that is basically qualitative treatment of the information inherent in the images. This proves to be a major shortcoming, leading to erroneous or unreliable results in many cases. To this end, technology transfer from the part of photogrammetry can be proven very beneficial. Such a contribution can be geared by the fact that photogrammetry has developed efficient tools for accounting for imaging formation geometry. These tools, appropriately tuned for medical applications, can accelerate the technology transfer across the involved disciplines. Understanding the possible photogrammetric contributions by the medical imaging experts, and realizing the medical problems in photogrammetric terms by the photogrammetrists, remains a major barrier to this transfer. The intended scope of this paper is to provide a foundation for exchange of ideas and provoke photogrammetric research interest in these issues. 相似文献
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Čeněk Šašinka Zdeněk Stachoň Petr Kubíček Sascha Tamm Aleš Matas Markéta Kukaňová 《The Cartographic journal》2019,56(2):175-191
The form of visual representation affects both the way in which the visual representation is processed and the effectiveness of this processing. Different forms of visual representation may require the employment of different cognitive strategies in order to solve a particular task; at the same time, the different representations vary as to the extent to which they correspond with an individual’s preferred cognitive style. The present study employed a Navon-type task to learn about the occurrence of global/local bias. The research was based on close interdisciplinary cooperation between the domains of both psychology and cartography. Several different types of tasks were made involving avalanche hazard maps with intrinsic/extrinsic visual representations, each of them employing different types of graphic variables representing the level of avalanche hazard and avalanche hazard uncertainty. The research sample consisted of two groups of participants, each of which was provided with a different form of visual representation of identical geographical data, such that the representations could be regarded as ‘informationally equivalent’. The first phase of the research consisted of two correlation studies, the first involving subjects with a high degree of map literacy (students of cartography) (intrinsic method: N?=?35; extrinsic method: N?=?37). The second study was performed after the results of the first study were analyzed. The second group of participants consisted of subjects with a low expected degree of map literacy (students of psychology; intrinsic method: N?=?35; extrinsic method: N?=?27).The first study revealed a statistically significant moderate correlation between the students’ response times in extrinsic visualization tasks and their response times in a global subtest (r?=?0.384, p?<?0.05); likewise, a statistically significant moderate correlation was found between the students’ response times in intrinsic visualization tasks and their response times in the local subtest (r?=?0.387, p?<?0.05). At the same time, no correlation was found between the students’ performance in the local subtest and their performance in extrinsic visualization tasks, or between their scores in the global subtest and their performance in intrinsic visualization tasks. The second correlation study did not confirm the results of the first correlation study (intrinsic visualization/‘small figures test’: r?=?0.221; extrinsic visualization/‘large figures test’: r?=?0.135). The first phase of the research, where the data was subjected to statistical analysis, was followed by a comparative eye-tracking study, whose aim was to provide more detailed insight into the cognitive strategies employed when solving map-related tasks. More specifically, the eye-tracking study was expected to be able to detect possible differences between the cognitive patterns employed when solving extrinsic- as opposed to intrinsic visualization tasks. The results of an exploratory eye-tracking data analysis support the hypothesis of different strategies of visual information processing being used in reaction to different types of visualization. 相似文献