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计算机软件及计算机应用
自然地理学和测绘学
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道路数据库
相关语句
  road database
     Through an example of construction of planning and road database in Dongguan, this paper analysed the management model of road planning data informationization and discusses the application and implementation of the GIS-based road planning data information management.
     通过介绍东莞市规划道路数据库的构建实例,分析了道路规划成果信息化管理模式,探讨了面向GIS的道路规划成果信息化管理实现及应用
短句来源
     Shortest Path Searching Based on City Road Database
     基于城市道路数据库的最短路径搜索
短句来源
     4. A product developed for affording Wuhan Construction and Management Commission reference to manage roads and ferries is showed. The software realizes all kinds of querying, statistic and analyzing under the fundamental of road database.
     4、技术上基于道路数据库的应用开发出了具有查询、统计、分析功能的应用系统——武汉市城市基础设施管理系统,本系统基于道路数据库,实现了道路各种方式查询、按照道路材料等级等进行统计并输出报表以及针对道路的路径分析。
短句来源
     There are four main contents here:1. Based on the fundamental of database designing, technical character of road database, and the data of this project, the research chooses appropriate database software, designs the spatial data and attribute data structure.
     1、根据数据库设计的基本思想、道路数据库的技术特点,探讨了网络结构与多边形表达一体化的道路数据库方案的选择,研究了空间数据的分层以及属性数据库的设计。
短句来源
     The time domain model of vehicle road is the key component of road database.
     汽车道路时域模型是基础性道路数据库的主体部分.
短句来源
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  “道路数据库”译为未确定词的双语例句
     With a precise GPS relative positioning system a local high precise database of roads is established, and then a static experiment and a car dynamic experiment are accomplished with the help of a Double-satellite positioning receiver.
     试验中,首先利用自行研制的GPS精密相对定位系统建立了一个局域高精度的道路数据库,然后借助双星定位用户机完成了车载及地面静态双星/道路组合定位试验。
短句来源
     As the same time, we have the experimentation for building database. Geostar is a appropriate software for transprotation database in database management and maintence.
     同时对数据入库进行试验,在数据库结构、数据格式、数据库管理和维护等方面国产地理信息系统基础软件Geostar完全满足建立国家基础地理信息系统道路数据库的要求。
短句来源
     So, these techniques will play an important role in construction of urban road base database and urban information system.
     因此城市道路基础数据库建立的这几个关键技术在城市道路数据库建库,城市信息系统的建立等方面都具有实用价值。
短句来源
     The author choose Beijing urban area as the study region.
     基于以上研究成果,本文以北京城区为研究区域,根据城市道路分类体系和城市道路重要性评价指标体系,按照属性特征的层次体系结构构建了北京城区道路数据库
短句来源
     In this paper, the author discusses the establishment of the path database, GPS data processing and the system reality chiefly. The central work including survey path coordinates using Vehicle-mounted GPS, processing dynamic data with the auto-adapted Kalman filter algorithm and increasing the path measuring accuracy.
     在论文中,对道路数据库的建立、GPS数据的处理以及系统的实现做了重点探讨,主要做的工作有:利用车载GPS测量道路坐标,并选择采用自适应Kalman滤波算法处理动态数据,提高了道路的测量精度;
短句来源
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  相似匹配句对
     Database
     数据库
短句来源
     Research on road traffic accident datebase
     道路交通事故数据库的研究
短句来源
     Research on the Road CAD Data Base
     道路CAD数据库的探索研究
短句来源
     Database constructions are explained.
     构建了数据库.
短句来源
     (4)Road;
     (4)道路
短句来源
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  road database
Elementary experiments have showed that the proposed framework could be used for developing an operational road database updating system.
      
We have developed a prototype system with a subset of the vector road database covering Munich city.
      
Adding the value of NAVTECH road database: an implementation of spatial data mining techniques
      
The system serves the purpose of value-adding the road database maintained by NavTech.
      
With the knowledge of relative importance of the individual attributes, users are given the flexibility to buy a local road database with truncated attribute list.
      
更多          
  transportation database
Below are listed the current projects which contribute to the ultimate goal of a comprehensive transportation database for the state.
      
Currently the district uses an older stand-alone software system to maintain its transportation database.
      
Finally, an E-911 agency could create yet a third transportation database for the area, segmenting all roads at each private driveway.
      
The Department of Roads is nearing completion of its efforts to bring the all the local road vectors into its statewide transportation database.
      
The current projects that contribute to the ultimate goal of a state comprehensive transportation database are briefly described below.
      
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A method of geostationary satellite positioning based on road is presented. The positioning accuracy is also discussed. Instead of the Digital Elevation Model (DEM), the high accurate information of the spatial road, on which is the user, is used in the very positioning method. The 3D positioning problem then becomes one parameter calculation. With a vector road database, theoretically, only one satellite ranging signal is needed to get user's position and the other signal can be used as a check. Obviously,...

A method of geostationary satellite positioning based on road is presented. The positioning accuracy is also discussed. Instead of the Digital Elevation Model (DEM), the high accurate information of the spatial road, on which is the user, is used in the very positioning method. The 3D positioning problem then becomes one parameter calculation. With a vector road database, theoretically, only one satellite ranging signal is needed to get user's position and the other signal can be used as a check. Obviously, it can not only improve the positioning precision, but also increase the system reliability. Some numerical simulation is also given to show its validity and feasibility.

提出了基于道路的同步卫星定位方法 ,并对定位精度问题进行了讨论。该方法利用高精度的道路数据库作约束条件来取代高程数据库 ,从而将 3维定位转化为单参数求解。在理论上只需要一颗卫星就能够定位 ,另一颗卫星的观测量可以作为检核。该方法既提高了系统的定位精度 ,又增加了系统的可靠性。理论分析和模拟计算表明 ,方法是有效可行的

The accuracy of the geostationary satellite positioning based on road is affected mainly by the ranging errors,the ephemeris erros,the central station's positioning errors and the road database errors.The error analysis is given in several cases,i.e.different road parameters and user positions.It shows that the main influence factors to user's plane accuracy are the ranging errors and the ephemeris errors,while to the height accuracy is come directly from the height error of the road database.

针对基于道路的地球同步卫星定位方法犤1犦,分析了几种主要的误差源(测距误差、星历误差、中心站站址误差和道路数据库误差)对定位精度的影响特点,从而给出了系统本身的定位精度及对道路数据库的精度要求。理论分析表示,测距误差、星历误差是影响用户平面精度的主要因素,而道路数据库的高程误差是影响用户高程精度的主要因素。另外,也进一步验证了该方法的可行性和可靠性。

In intelligent traffic navigation or dynamic path abduction systems, the shortest path searching is the basic function. According to the nature of road net of a city, the database structure describing the city road net is studied. Based on the database structure and the need of a GIS system, the road information is collected. Then Dijkstra algorithm is used to realize fast searching of the shortest path. The electronic map of Guangzhou is presented to show an example of city raod searching, the time of a...

In intelligent traffic navigation or dynamic path abduction systems, the shortest path searching is the basic function. According to the nature of road net of a city, the database structure describing the city road net is studied. Based on the database structure and the need of a GIS system, the road information is collected. Then Dijkstra algorithm is used to realize fast searching of the shortest path. The electronic map of Guangzhou is presented to show an example of city raod searching, the time of a shortest path searching result, which includes 61 crossings, being about 2.2 s.

在智能交通的导航/动态路线诱导系统中,最短路径搜寻是其重要功能.根据城市交通路网建设的实际,研究了描述城市交通网络图的城市道路数据库的组织结构.在此数据结构的基础上依靠GIS技术的支持,采集了大量具体道路信息,采用Dijkstra算法实现了快速最短路径搜索.根据城市的交通状况对交通网络图的边值赋予不同的权值可实现最优路径搜寻.给出了在广州市电子地图上搜索的一个实例:一个包含61个交通路口的最短路径搜索结果的搜索时间约为2.2s.

 
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