Efficiently compressing vector map data is the basic requirement of an embedded GIS.
满足功能并对矢量地图数据进行高效压缩，是嵌入式GIS系统的基本要求。
Putting forward the change detection flow of areal ground features based on vector map data.
提出基于地图矢量数据面状地物变化检测的流程。
Firstly, the request of vector map data is summarized, such as color-setting standard, attribute definition of topographic feature, etc.
首先对入库的矢量图形数据要求做了概述，如要素的分层设色标准、地形图要素属性项定义等；
Data encryption is a main means to keep data in safety. Concerning the characteristics of vector map data, the paper presents an encryption algorithm based on chaotic sequence.
加密技术是保障数据安全的最主要的手段，结合矢量地图数据的特点，设计了一种基于混沌序列的数据加密算法。
Putting forward the change statistic method based on acreage, and counting the varieties of vector map data by using polygon intersection of vector data and changed pixel of raster data.
提出基于面积的变化统计方法，分别利用矢量数据的多边形交集和栅格数据的变化像素来统计地图矢量数据的变化。
The topology processing is the prediction of the data searching and analysis, and the vector map data compressing is good for economizing memory space and speeding up the data processing.
拓扑处理是数据查询与分析的前提，矢量数据压缩则有利于节省存贮空间和提高数据处理速度，文中也讨论了电子地图制作系统中所采用的拓扑及数据压缩方法。
Experiment results indicate that the proposed metric fits the characteristic of vector map data better and, furthermore, it can achieve more reasonable measuring results than previous methods.
实验结果证明，本文提出的度量方法更符合矢量数据的特点，能够得到比现有方法更准确的度量结果。
The other platform may not know which Collection type it should map it to, and the data elements contained in Vector are also mapped to AnyType in WSDL.
其他平台可能不知道将其映射到哪个collection类型，而且Vector中包含的数据元素也映射到WSDL中的AnyType。
According to Venture Beat, the smaller vector graphics used in the updated maps will allow for caching of map data that you most often use, giving you a more consistent experience.
据科技博客VentureBeat报道，升级后的地图采用信息容量较小的矢量图形，可以缓存用户使用频繁的地图信息，让用户体验到更稳定可靠的操作应用。
Vector data require far less storage than raster data because arc node lists simplify and reduce the data required to make sense of the features contained in the map.
矢量数据要求的存储要比栅格数据少得多，因为弧节点列表简化并减少了表示地图中包含的特征所需的数据。
These data also make it much easier to search the map or the vector representation's various layers.
这些数据还非常便于搜索地图或用矢量表示的各种图层。
Containers, where common data structures are defined, such as vector, set, list, map etc.
容器。一般都是一些普通的数据结构，如vector,set,list, map。
This paper introduces the features and advantages of Scalable Vector Graphics (SVG). Relevant data structure is defined based on the representation and organizing of Map Element.
简要介绍了SVG(可缩放向量图形)的特点和优点，根据“地图元素”的表现方式和组织结构，定义了相关数据结构。
In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.
论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。
It is difficult to automatically and accurately extract vector data from thematic map because of annotations.
注记信息的存在使得从专题图自动获取矢量数据具有一定难度。
Map projection transformation of vector data is becoming mature presently, but research and application of raster data projection transformation in GIS needs further efforts.
当前GIS中矢量数据的投影变换已日趋成熟，而栅格数据的投影变换的研究与应用还需要进一步的深入。
This paper analyzes the problems in data input of digital map publish especially in vector data input, and indicates the importance of multi-source vector data use.
文中分析了当前数字地图出版中数据输入尤其在矢量数据输入方面存在的诸多问题，指出了多源矢量数据利用的重要性。
This paper analyzes the current situation of vector electronic map and investigates the realization of vector electronic map with object-oriented data model and structure.
分析了矢量电子地图的现状，对采用面向对象的数据模型和数据结构实现矢量电子地图进行了研究。
To improve the efficiency of automatic maps edge matching of massive digital map data of great regions even global ones, virtual stitching algorithm based on vector ID mapping is presented.
为了改善数字地图图幅自动接边算法在处理大区域甚至全球范围的大数据量图幅接边时效率低的问题，提出了基于矢量id映射的“虚拼接”算法。
The approach of using vector data to make map, which is based on the above model, can quickly acquire the vector geographic information with publishable efficiency.
基于该矢量一体化全局模型的矢量数字成图方法，可快速获取具有出版效能的矢量地理信息。
Its capabilities include: data input, geographical analysis (raster, vector and site), manipulate multi-spectral images and map display.
其功能包括：数据输入、地理分析(栅格、矢量、点)、多光谱图像处理、地图显示。
But most of topographical map database produced by survey department is only cartographic data, which is vector data structure, but cannot be imported into GIS directly to meet GIS using.
但测绘部门建立的地形图数据库多为单纯的制图数据，虽然与GIS数据一样是矢量结构，却无法直接输入GIS以满足应用需要。
It is the basic function for GIS to get unit polygon by overlaying the vector map, but the uncertainty of polygon is the disastrous factor affecting GIS's data quality.
用矢量基础图件叠加来获取单元图斑的方法是GIS的基本功能，但叠加多边形的不确定性成为影响GIS数据质量的灾难性因素。
In this paper we discuss the important parameter the ocean surface current and raise an algorithm to generate the vector current map in terms of data from two pieces of radial current map.
针对海洋动力学重要参数-海流，利用两台雷达的海洋表面径向流图，来生成海洋表面矢量流图的算法，并给出计算机模拟的结果。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
Then, by applying this algorithm to the picture after pretreatment, we realize its edge-detection and get vector graphical data. As a result, we solve digital problem of geological contour-map.
然后，对预处理后的图像运用此算法实现了地质等值线图的边缘探测，并得到矢量图形数据，从而解决了地质等值线图件数字化问题。
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