vector map

This paper focus on the map projection and coordinate system, multi-scale vector data on the sphere of expression, vector data in the symbolic by three-dimensional API and do some systemic analysis, discussion and testing.

重点对地图投影及坐标系、多比例尺矢量数据在球面上的表达、矢量数据在三维API中的符号化进行了较为系统的分析、论述和试验。

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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.

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It is the chiefly term for map publishing to symbolize vector map data of all elements.

把地图矢量数据在MicroStation中进行全要素符号化是实现其地图生产出版的首要条件。

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A Study on the Algorithm of the Ocean Surface Vector Current Map

一种海洋表面矢量流图生成算法的研究

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The error sources of large scale scan vector digitization, which these authors consider, is basic essential object error, workers' error, rectification error of scan image, and quondam relief map error.

经过对大比例尺地形图数字化的精度分析，认为要素对象误差、作业员的作业误差、扫描图像纠正误差、原地形图的误差是地形图扫描矢量数字化的主要误差来源。

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some energy based metrics, e. g. peak signal to noise ratio(psnr), have some limitations while applied to vector map watermarking systems.

峰值信噪比（PSNR）等基于能量的度量指标在应用于矢量地图水印系统时具有一定的局限性。

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a new method for building reconstruction based on vector map and non-metric camera image

利用地图与单影像进行建筑物三维重建的新途径

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The Symbolization Research for Vector Map Base on MicroStation

MicroStation环境下地图矢量数据全要素符号化研究

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The quality of the glyphs rendered from bit-map fonts always drops when they are scaled up, while that from vector fonts does not.

点阵字体符号在放大时质量一定会下降，而向量符号则不会。

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The functions of vector graph edit, chart layer management, map scan have been realized with the application of MAPGIS.

开发利用MAPGIS的相关功能，实现了矢量图编辑、图层管理、浏览功能。

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It is difficult to testify the validity of this method in mathematics, so this paper uses some vector data at 1:400 scale and an ECW image to verify raster-based map information measurement.

由于栅格地图信息量计算方法难以用数学的方法来证明，论文分别以1：400万全国矢量数据和黄河三角洲的ECW影像数据为例，计算了它们在不同尺度下固定视窗内的信息量。

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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；

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T 1: In the Main Display Area mainly display intelligence, vector map, scale line etc.

主显示区域主要显示情报 、 量地图 、 度线等.

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The two-dimension polyline set, triangle mesh and point sampled model are primary methods of geometric model representation and are widely employed to represent the vector map and three-dimension geometric model corresponsively.

二维折线集、三角网格和点是几何模型表示中的基本元素，分别被广泛用于二维矢量地图和三维物体模型的表示。

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The company provides raster to vector conversion and map digitizing services using R 2 V software.

The公司提供光栅矢量转换和地图数字化服务使用R2V矢量化.

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