地图精度

在GPS定位信息和电子地图精度一定的条件下，地图匹配算法的优劣成为决定导航及定位精度的关键因素，因此深入开展这方面的研究是十分必要的。

On condition that the accuracy of GPS positioning information and digital map data are both fixed , the map matching algorithm becomes the key factor in the precision of the navigation and positioning .

通过多次跑车轨迹可以在导航的同时记录下轨迹拐弯点，为提高数字地图精度提供了一种新方法。

By many sports car track can be recorded in the navigation path while turning point for improving the accuracy of digital map provides a new way .

针对数字化成图的过程中可能影响成图质量的各种因素进行了一些探讨，并阐述了评价数字化地图精度的方法。

This article probes into all kind of possible elements of influencing the quality of map - ping during the process of digital mapping , and also discusses the methods of evaluating the accuracy of digital mapping .

根据大比例尺地形图特点，利用已测坐标点（控制点或碎部点）进行分块局部纠正的数字化方法，以提高数字化后地图精度，并消除地形图要素间的相互位置的矛盾。

According to characteristic of Large-Scale map , a digitizing method of partial correc-tion with coordinated point ( control point or detail point ) is discussed to raise the accu-racy of digitizing results and remove the contradictory of site in map element .

DOM是正射纠正后的栅格影像，同时具有地图几何精度和影像特征；

DOM , the raster image after geometric correction , has map geometric resolution and rich content ;

城市影像地图及其精度分析的研究

Research of the Image Map of City and Precision Analysis

此外，在精度分析的基础上，还对影像地图的精度控制作了阐述。

Furthermore , it expose accuracy control of image map by accuracy analysis .

因此，为了提高道路网络中的地图匹配精度，提出了基于短时预测的地图匹配算法。

In order to improve the precision of map matching , a new map matching algorithm based short-term prediction was proposed .

为人们阅读而设计的地图的精度为10米级别，但自动驾车汽车需要以厘米精度了解自己的位置。

Maps designed to be read by people have a 10 metre accuracy level but autonomous cars will need to know where they are to the nearest centimetre .

所有算法均通过一定数量的实例图像进行了仿真测试，并对算法的鲁棒性、普适性，以及地图综合精度等关键问题进行了较深入的讨论，指出了不足和今后要研究的方向。

All of the algorithms are by a number of examples of image to carry out by simulation test . And it has in-depth discussion in robust 、 universality and cartographic generalization accuracy . At the same time , it points out the problems and research directions in future .

矢量地图数据属性精度的检查与控制

The Check and Control of Attribute Accuracy of Vector Map Data

地图扫描数字化精度分析与误差分布检验

Accuracy Analyzing and Error Distribution Testing of Map Scanning Digitization

算法根据矢量地图对数据精度的特殊要求提出了相应的水印嵌入条件，并通过修改地图中相邻顶点坐标间的差值来嵌入水印信息。

According to the vector map 's special requirement to data precision , an embedding condition is firstly presented .

最终得出了利用全数字化摄影测量系统测制（1∶10000）数字线划地图其几何精度可以达到传统的模拟测图和解析测图的几何精度的结论。

The conclusion is that the geometric accuracy of the digital line graphics by total digitalizing photogrammetric system can reach by the traditional analogous methods or analytical methods .

理论分析、计算机仿真及实验表明：该项研究为结合电子地图的高精度陆上定位，以及高精度海上定位导航，提供了可靠的理论依据及简化算法。

It shows that this study provides good theory proof and simple algorithm of high accuracy connecting electronic map in maritime or land over theory analysis , computer simulation and experiment .

基于地图匹配的高精度GPS自主车辆导航系统的实现

Implementation of High-precision GPS Autonomous Navigation System Based on Map-matching for Vehicle

本文针对数字化地图的曲线拟合精度进行了研究，提出了评定拟合质量的标准和计算方法。

This paper deals with the precision of curve fitting for digitizing map . The evaluation standards and curve fitting methods are introduced .

对比三种不同的约束构建方法，仿真结果表明以最大方差和最小方差路标对构成约束能大幅提高路标的估计精度，达到同时兼顾地图创建效率与精度的目的。

The results show that the constraint constructed with the maximum variance and minimum variance landmark pair can greatly improve the map accuracy and balance the mapping accuracy and efficiency .

从城市基础地理信息的数据内容、地图比例尺、位置精度、空间数据的拓扑关系及数据更新等方面，讨论城市基础地理信息系统的建立。

This paper discusses the establishment of urban fundamental GIS through introducing the data connotation of urban base geographic information , map scale , positioning precision , spatial topology relation , data revision and so on .

本文首先描述了机器人在工作空间中的运动，给出了一种非固定局部电子地图的创建方法，解决了工作空间较大时地图精度和存储容量之间的矛盾。

At the beginning of this thesis motion of the robot in the working space is introduced and a non-fixed local map method which settles the conflict between map precision and limited storage space is given .

尽管这方面的研究已经取得了丰硕成果，但在地图表述方式、算法复杂度和运算时间、地图估计精度以及大规模和动态环境的地图创建等方面仍然存在许多挑战。

Despite significant progress in this area , it still pose great challenges , such as appropriate map representation , reducing computational complexity and mapping in real time , improving the accuracy of the estimated map , mapping in dynamic large scale environments and so on .

实验表明，文中所述的地图定向方法在提高自动化程度的同时，也提高了地图定向的精度。

Experiments show that the automated map orientation is realized and the accuracy of orientation is also raised with the method proposed in this paper .

实验结果表明，机器人采用本方案可以在实验室走廊环境中创建一致的特征地图，同时利用该地图进行定位。融合定位方法可以进一步提高创建地图的精度。

Mixed localization approach can enhance the precision of the constructed map . Experimental results demonstrate that the proposed method can successfully create a consistent map of our laboratory aisle environment while locate itself using the map .

在概率栅格地图中，引入了距离影响因子，调整了声纳概率测距模型，提高了地图的精度。

In probabilistic grid maps , range confidence factor is introduced in ultrasonic model , and improves the map accuracy .

而目前，地图印刷已经实现了全数字化生产，特别是四色印刷机的配备，将改变地图生产的作业状态，特别是困扰地图印刷的套印精度问题已经从根本上得到解决。

And today , the map printing has already carried out total digital production , especially the usage of four colors printing machines , change the map produce of task appearance .