The Differentiation of Point Symbols using Selected Visual Variables in the Mobile Augmented Reality System     

Łukasz Halik  Beata Medyńska-Gulij 《The Cartographic journal》2017,54(2):147-156

On the basis of initial studies devoted to a better understanding of how the public user (a pedestrian in the city) perceives cartographic symbols in the mobile augmented reality system, we present an attempt to determine the threshold values of differentiation for three visual variables. The variables of size, transparency, and focus were implemented into image point symbols representing five types of objects. The set of symbols was designed in accordance with the rules of cartographic design taking into consideration an analysis of 19 professional tourist works. The symbols were presented on the screen of a mobile device in a system imitating the augmented reality system against four different backgrounds: white, a wall, and two typical urban landscapes. The results of an internet survey conducted using a tablet at four locations in Poznan (Poland) allowed us to determine the following: threshold differentiation values for the analysed variables, indication of the dependence on the type of background displayed on the mobile device in augmented reality, and the advantage of using a combination of visual variables.  相似文献   

RTK测绘技术在电力工程施工中的应用     

刘鸿剑  何亮  王巍 《测绘与空间地理信息》2017,(10):170-173

在先进的科学技术冲击下,传统测绘测量已经无法满足当代电力工程行业的发展需求。所以,在电力工程行业迅猛发展的背景下,应把"多元化"作为指导思想,开发新型的测绘技术,如RTK测量技术。RTK测量技术具备较强的抗干扰优势,同时采用了实时动态测量技术,因而,可保证电力工程数据测量精度,应对其进行推广,以利于更好地完成工程测量工作。  相似文献   

地名普查外业采集核查系统的建设与应用     

孙俊英  刘吉  骆书飞  蔡忠亮 《测绘与空间地理信息》2017,(10):213-215

在传统的地名普查外业采集核查工作中,存在地名定位困难、采集表携带不便、采集数据精度低、数据整理繁琐等诸多缺点。本文设计研发了基于Android平台的移动终端外业采集核查系统,实现了全数字化地名外业采集核查,为地名普查外业工作提供了一种全新的调绘核查方式。该系统在贵阳市地名普查中已正式投入使用,取得了良好的效果。  相似文献   

基于移动GIS的小型移动应急平台的设计和实现   总被引：2，自引：0，他引：2  

周隽  花向红  涂伟  李昭 《测绘工程》2008,17(2):39-42

随着城市的不断发展,城市公共安全问题日益突出,公共安全事件频发,提高公共应急反应的速度成为公共安全管理的一个重要方面。公共安全应急需要相应的各种技术作为支持,文中将移动GIS运用到公共安全应急中,设计并实现了小型的移动应急平台。该平台由移动应急终端和移动应急中心组成,集成了GIS、GPS、GPRS技术,可以为公共安全事件的现场处置提供有效的支持。  相似文献   

基于Mobile Agent技术的个人移动导航设计方案     

魏震方 《测绘科学》2008,(Z1)

文章首先介绍了个人移动导航的概念与研究现状及所面临的问题,然后引入移动Agent技术,并对其进行了概念与特征的介绍。提出了基于Mobile Agent技术的个人移动导航设计方案。该方案集成了无线接入网技术,移动Agent技术,Web服务技术等核心技术,采用了构件化任务封装与UDDI注册管理Agent系统的解决思路。方案具有较好的构建性与可扩展性。最后总结了基于移动Agent技术的个人移动导航系统设计方案的一些优点,指出了移动服务向普适计算模式发展的必然趋势。  相似文献   

移动GIS中语音与自然语言的应用模式探讨     

LONG Yi      ZHANG Ling      HU Lei-di      LV Guo-nian   《测绘学院学报》2008,(1)

自然语言及其语音技术的应用是提高移动GIS智能化程度,完善其人性化服务体系的重要内容之一。从移动GIS的系统构成与应用需要出发,初步阐述了在移动GIS环境中语音和自然语言的应用意义及其关键技术,在此基础上探讨了语音与自然语言的多种应用模式,包括集中方式与分布方式,自然语言对话、人机交互应答及其混合方式,特定人与非特定人方式等,并概括分析了在移动GIS方案中采用各种语音应用模式的基本思路。  相似文献   

利用MLSC法求解高程异常     

李冲  张勤  魏玉明  刘站科 《测绘科学》2008,33(1):43-44,70

运用常规的拟合模型求解大范围高程异常必然存在较大的模型误差,鉴于模型误差的不确定性,可以将模型误差看作信号采用最小二乘配置法来处理,最小二乘配置中协方差函数的确定是一个比较棘手的问题,介于此,本文提出了移动最小二乘配置法,对不同的待定点建立不同的配置模型,并通过定权的方式解决复杂的协方差函数计算问题,对一个大测区的部分GPS水准数据进行解算,获得了满意的结果。  相似文献   

Semantic Execution Meets Geospatial Web Services: A Pilot Application     

Raluca Zaharia  Laurentiu Vasiliu  Joerg Hoffman  Eva Klien 《Transactions in GIS》2008,12(Z1):59-73

  相似文献   

Ingress in Geography: Portals to Academic Success?     

Michael Davis 《The Journal of geography》2017,116(2):89-97

Niantic Labs has developed an augmented virtual reality mobile app game called Ingress in which agents must seek out and control locations for their designated factions. The app uses the Google Maps interface along with GPS to enhance a geocaching-like experience with elements of other classical games such as capture-the-flag. This study aims to assess the effect Ingress can have on introductory to physical geography students. These goals include: whether the students can acquire greater geographical interest through Ingress, garner a sense of community, and whether students exhibit improved exam scores in the classroom.  相似文献   

Coupling mobile phone and social media data: a new approach to understanding urban functions and diurnal patterns   总被引：1，自引：0，他引：1  

Wei Tu  Jinzhou Cao  Shih-Lung Shaw  Meng Zhou  Zhensheng Wang 《International journal of geographical information science》2017,31(12):2331-2358

Understanding urban functions and their relationships with human activities has great implications for smart and sustainable urban development. In this study, we present a novel approach to uncovering urban functions by aggregating human activities inferred from mobile phone positioning and social media data. First, the homes and workplaces (of travelers) are estimated from mobile phone positioning data to annotate the activities conducted at these locations. The remaining activities (such as shopping, schooling, transportation, recreation and entertainment) are labeled using a hidden Markov model with social knowledge learned from social media check-in data over a lengthy period. By aggregating identified human activities, hourly urban functions are inferred, and the diurnal dynamics of those functions are revealed. An empirical analysis was conducted for the case of Shenzhen, China. The results indicate that the proposed approach can capture citywide dynamics of both human activities and urban functions. It also suggests that although many urban areas have been officially labeled with a single land-use type, they may provide different functions over time depending on the types and range of human activities. The study demonstrates that combining different data on human activities could yield an improved understanding of urban functions, which would benefit short-term urban decision-making and long-term urban policy making.  相似文献