车载导航电子地图中语音提示应用与问题探讨     

李汝雯  刘杨 《地理信息世界》2013,(5)

伴随着国家经济建设的飞速发展,我国城市建设也取得了长足的进步,交通网络四通八达,车载导航产品竞相上市,并成为解决定位服务的领先力量。作为车载导航的重要功能的路径规划与语音提示功能备受消费者关注。车载导航电子地图成为驾车出行不可或缺的辅助工具,尤其是车载导航电子地图的语音提示功能,已变得举足轻重,应用越来越广泛。本文主要就车载导航电子地图使用中语音提示问题进行探讨,并提出一些建议。  相似文献   

The role of the International Maritime Organization in reducing vessel threat to whales: Process,options, action and effectiveness     

Gregory K. Silber  Angelia S.M. Vanderlaan  Ana Tejedor Arceredillo  Lindy Johnson  Christopher T. Taggart  Moira W. Brown  Shannon Bettridge  Ricardo Sagarminaga 《Marine Policy》2012

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Marine renewable energy and public rights   总被引：1，自引：0，他引：1  

Paul Todd 《Marine Policy》2012,36(3):667-672

Marine renewable energy is likely to be an important part of UK energy policy over the next decades. A start has already been made, but to generate power on a significant scale requires the use of vast areas of ocean, on which there are competing claims. Legislation, and in particular the Energy Act 2004, goes a long way towards giving developers the legal infrastructure they need, to invest with confidence. But it is far from perfect, in dealing with important competing rights. This article has a narrow (but important) focus. It assumes that there are no problems over jurisdiction or international law. It is concerned principally with the rights of UK citizens. The issue is about reconciling the generation of large-scale marine renewable energy with other legitimate uses of the sea, and in particular fishing and navigation rights.  相似文献   

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冯来平  张洪  贾小林  吴显兵 《大地测量与地球动力学》2010,30(4):92-97

????IRNSS?????????????????????????????ξ?????????????????IRNSS?????????????λ????????????????????????????????IRNSS???????????Ч???????????????????????????????IRNSS??????????????????????????????????????????????2 000 km????????????????10 m??????λ????????????????????????????????????PDOPС??6????????????????Ч??????????95%???????????  相似文献   

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熊晶  周义炎  吴云 《大地测量与地球动力学》2010,30(5):24-27

?????й???????????????GNSS???????????????????2010??4??14??????Ms7.1????????и???4??GNSS??????LHAS??LUZH??DLHA??WUSH??????TEC?????????????й???TEC??????????????????????TEC??????????????????LHAS??LUZH??WUSH???4??1????????????TEC?????????????LHAS??LUZH??DLHA???4??5???????????TEC?????????????TEC????????????????????5???????????????????????????й?????????  相似文献   

On A☆ search with stopover areas     

Torsten Sander  Philipp Wehner 《International journal of geographical information science》2013,27(6):799-819

Today's map navigation software offers more and more functionality. For example, it cannot only route from a start to a destination address, but the user can also specify a number of via destinations that are to be visited along the route. What is not commonly found in the software is the handling of so-called stopover areas. Here the user specifies a sequence of geographic areas and wants the route to lead into or through each of these areas (but he does not actually care where exactly). A modification of the well-known A^☆ algorithm that considers convex stopover areas is presented. Algorithmic variants and implementation issues are discussed. Example results on a real-world data set are presented for the case of axis parallel rectangular stopover areas.  相似文献   

“数字重庆”地理空间信息定位基准体系的建设     

徐永书  夏定辉  欧其健 《地理空间信息》2013,(3):4-6

介绍了"数字重庆"地理空间信息定位基准建设的基本情况,着重阐述了CQGNSS、高精度GPS控制网、精密水准网和区域似大地水准面精化等方面的数据处理情况,展示了山城地区的基准体系建设特点。  相似文献   

The Kitab-ı Bahriye (Book of Navigation) of Piri Reis     

《The Cartographic journal》2013,50(3):278-283

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天文导航标准体系建设现状与未来发展     

朱筱虹  徐瑞  张俊艳 《地理空间信息》2011,9(3):145-147,150

天文导航是利用对自然天体的测量来确定自身位置和航向的导航技术.通过分析天文导航技术的发展现状和应用领域,梳理了国内外天文导航技术的相关标准,给出了天文导航技术的一种标准体系,并对天文导航制定的标准未来发展提出了建议.  相似文献   

新型地籍测绘模式初探     

韩军生  顾和和 《测绘与空间地理信息》2011,(6):261-263

地籍测量的特殊性要求其测绘精度高,速度快。从我国政策和现状来看,当前快速的经济建设要求更高效的地籍变更测量模式。然而目前在地籍测量方面最常用的测量模式效率低下,精度损失严重,不能有效反映土地现状,无法为经济建设提供可靠依据。鉴于GPS/INS新型测量模式的独特优势,提出将GPS/INS应用于地籍测量领域。初步设计了GPS/INS进行地籍测量的思路,并结合GPS和INS的优缺点,提出了注意事项。考虑到研究现状,指出了这一设想实现需解决的关键技术。  相似文献