共查询到19条相似文献，搜索用时 144 毫秒
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视觉变量是微地图在设计表达过程中的关键部分,该文针对现有视觉变量研究成果并不完全适用于微地图这一问题,研究并提出了微地图符号的视觉变量.通过对比分析微地图与常用地图的不同,得到了微地图符号简单化、多元化、个性化、模块化的特点,在此基础上提出了符合微地图符号特点的视觉变量表达方式;考虑用户、环境、地物3个方面的影响,应用微地图视觉变量设计了微地图符号;实现了校园导航微地图的设计,并运用问卷调查验证了微地图视觉变量表达及应用的合理性.结果表明,提出的理论及方法能较好地表达微地图内容,能够为微地图的应用提供理论支持. 相似文献
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虚拟现实技术使传统二维的、静态的地图表示向三维的、动态的场景表示方向发展,传统的二维符号视觉变量已不适应三维虚拟战场环境的需要。本文结合三维虚拟环境的特点,提出了一套基本适应三维虚拟战场环境的三维符号视觉变量。 相似文献
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地图可视化的技术和分类 总被引：3，自引：1，他引：2
可视化技术已远远超出了传统的符号化及视觉变量表示法的水平,进入了在动态时空变换、多维可交互的地图条件下探索视觉效果和提高视觉工具功能化阶段。本文介绍了地图可视化的特点,分析了地图可视化的九项主要技术,在此基础上研究了目前可视化地图的三种分类,即动态地图、虚拟地图和超地图。由此了解到地图可视化在地图制图学中的重要地位和作用,随着网络技术、虚拟现实技术等各种技术的提高,地图可视化将得到进一步的发展。 相似文献
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地理要素三维模型的建立及其与地形融合的研究 总被引：1，自引：0，他引：1
在阐述地理要素三维表达的理论基础上,通过对传统Bertin视觉变量的动态与三维扩展,以传统的地图表现理论为参照,并结合三维环境的特点,系统地分析、探讨地理要素在三维空间中不同比例尺条件下顾及地形的三维符号化表达,分别研究点状、线状和面状地理要素基于地形模型的符号化表达方法. 相似文献
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多媒体电子地图中地图漫游与矢量地图动态缩放的实现 总被引：1，自引：0，他引：1
在多媒体电子地图软件中,地图漫游与缩放是使静态地图成为动态地图的关键。本文着重阐述了利用多媒体创作工具Ａｕｔｈｏｒｗａｒｅ与Ｖｉｓｕａｌ Ｂａｓｉｃ相结合,在多媒体电子地图的软件工实现地图漫游,矢量地图的动太缩放,矢量地图的动态缩放,特征点查询的方法。 相似文献
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针对即时定位与地图构建(SLAM)在室内动态环境下定位精度低和地图效果差的问题,提出一种基于几何约束和目标检测的室内动态SLAM方法. 使用目标检测网络获取语义信息,提出运动物体漏检的方法;根据先验知识,提出准确识别动态区域的信息判定方法;结合几何约束和深度学习方法剔除动态点,利用静态点估计相机位姿;根据存储信息构建可闭环的静态地图. 在TUM数据集上进行实验,定位精度比ORB-SLAM2提高97.5%,相较于其他动态SLAM可取得更好的性能. 在室内真实环境进行实验,构建的静态地图更准确,有效提高了室内动态SLAM的定位精度和地图效果. 相似文献
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地图视觉化——现代地图学的核心 总被引：11，自引：1，他引：11
地衅视沈化是目前地理信息系统（GIS）和现代地图学的研究热点，作者对地衅视学化进行了初步的研究，指出地图视觉化是为视觉思维而进行的图形表示过程，它的特点集中体现在动态性、交互探究性和超媒体结构。文章着重分析了地图社同觉化的上述三个御吸三个基本的技术层次。最后作者认为建立地图视觉化的理论框架，开发相应的地图视觉化工具是目前这一领域的紧迫课题。 相似文献
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ABSTRACTAnimations have become a frequently utilized illustration technique on maps but changes in their graphical loading remain understudied in empirical geovisualization and cartographic research. Animated streamlets have gained attention as an illustrative animation technique and have become popular on widely viewed maps. We conducted an experiment to investigate how altering four major animation parameters of animated streamlets affects people’s reading performance of field maxima on vector fields. The study involved 73 participants who performed reaction-time tasks on pointing maxima on vector field stimuli. Reaction times and correctness of answers changed surprisingly little between visually different animations, with only a few occasional statistical significances. The results suggest that motion of animated streamlets is such a strong visual cue that altering graphical parameters makes only little difference when searching for the maxima. This leads to the conclusion that, for this kind of a task, animated streamlets on maps can be designed relatively freely in graphical terms and their style fitted to other contents of the map. In the broader visual and geovisual analytics context, the results can lead to more generally hypothesizing that graphical loading of animations with continuous motion flux could be altered without severely affecting their communicative power. 相似文献
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《制图学和地理信息科学》2013,40(4):201-214
Scientists visualize data for a range of purposes, from exploring unfamiliar data sets to communicating insights revealed by visual analyses. As the supply of numerical environmental data has increased, so has the need for effective visual methods, especially for exploratory data analysis. Map animation is particularly attractive to earth system scientists who typically study large spatio-temporal data sets. In addition to the "visual variables" of static maps, animated maps are composed of three basic design elements or "dynamic variables"–scene duration, rate of change between scenes, and scene order. The dynamic variables can be used to emphasize the location of a phenomenon, emphasize its attributes, or visualize change in its spatial, temporal, and attribute dimensions. In combination with static maps, graphs, diagrams, images, and sound, animation enhances analysts' ability to express data in a variety of complementary forms. 相似文献
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《制图学和地理信息科学》2013,40(4):350-362
Animated choropleth maps enable cartographers to visualize time-series data in a way that congruently depicts change over time. However, users have difficulty apprehending information encoded within these displays, and often fail to detect important changes between adjacent scenes. Failures of visual experience, such as change blindness, threaten the effectiveness of dynamic geovisual displays, in which several important changes can occur simultaneously throughout the display. Animated choropleth maps require viewers not only to notice changes but also understand symbolic meanings encoded in rapid transitions between scenes. Graphic interpolation between key frames, also known as “in-betweening” or “tweening”, smoothes transitions and lengthens the duration of the transition between scenes in a dynamic sequence. Previous cartographic literature suggests tweening could be a potential solution for change blindness in the cartographic context. This article examines this issue of change blindness in the cartographic context and reports on a human subjects investigation designed to evaluate the influence of cartographic design variables on map readers' change detection abilities. Our results indicate that 1) map readers have difficulty detecting changes in animated choropleth maps, 2) map readers over-estimate their own change detection abilities, and 3) tweening influences the legibility of change in animated choropleth maps. 相似文献
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The main focus of this paper is the effectiveness of dynamic point symbols in the presentation of quantitative data. Such symbols are of particular use in the design of animated maps and computer games. The authors examine three existing techniques of using dynamic point symbols to present quantitative data: blinking, pulsation, and rotation. The aim of the study is to compare their effectiveness with that of classical cartographic animation techniques. The results of the study show that in animated map design, dynamic point symbols might be used to present not only qualitative but also quantitative data with comparable effectiveness. The results may serve as the basis for designing dynamic point symbols to be as effective as the classical techniques used in animated cartography. 相似文献
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尺寸是地图符号的最基本视觉变量之一,人们通过对符号尺寸的视觉判断和比较形成对定量地理信息的认知。作者提出了一种适用于等级符号法制图的尺寸设计方法,其特点是使等级系列圆的面积变化遵循斐波纳奇数列规则。论文分析认为,一方面该方法可以在一定程度上补偿人们视觉认知中的低估量;另一方面,与经典的Meihoefer系列圆、Dent系列圆相比,其数学上的规律性既便于制图者灵活掌握,在数字制图软件中也易于实现,因而具有较大的实用性。 相似文献
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三维地图符号视觉参量研究 总被引：7，自引：0，他引：7
在常规地图符号参量体系上,通过引入动态特征、交互式操作等方面的参量,提出了三维地图符号的视觉参量,它由状态、动态变化和操作三个方面的参量组成,并采用认知实验研究了这些符号参量在质量特征、数量特征、关系特征以及动态特征等信息表达上的应用及功效. 相似文献
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《The Cartographic journal》2013,50(4):313-320
AbstractThe potential of unclassed animated choropleth maps as a solution to false patterns of geographic change arising from data classification is investigated. Old concerns about unclassed choropleth maps may be mitigated through map interactivity that offers four advantages over traditional data legends, and previous insights from testing static choropleth maps do not necessarily translate to animated cartography. Data from user testing revealed unclassed animated choropleth maps neither help nor hurt the ability of map readers to understand patterns of geographic change. However, the unclassed map (1) appeared 'less jumpy' to participants and was perceived to run at a slower pace (despite running at the same number of frames per second), and (2) subtle geographic shifts (e.g., seasonal unemployment cycles) were more readily noticed on the unclassed maps. Preliminary results also suggest classed data emphasise stability over time – while their unclassed counterparts improve our ability to see changes. This paper also outlines animated simultaneous contrast as a new perceptual issue in the creation of animated choropleth maps. 相似文献
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本文以视觉变量理论为基本依据,总结了面状符号设计的知识和经验;分析了影响面状符号设计的因素;阐述了面状符号设计的过程;并介绍了系统的结构,知识的表示方法、系统的功能等。文章指出,面状符号设计专家系统模块作为专题地图设计专家系统的一部分,可以对任一幅专题地图上的各种面状符号进行设计并作各种修改;系统的自适应功能可以使系统在运行中不断修改和完善系统的知识库。 相似文献