地图投影

The system can be used alone or be integrated into other GIS systems to enhance their map projection function. map projection ; map projective transformation ; analytical ordinal transformation ; analytical athwart transformation

在GIS应用系统中往往需要管理多种不同地图的地理数据，这些不同投影的数据在进行地理空间分析或信息复合时需要坐标同化，需要将不同投影的坐标统一到同一个坐标空间中，随着G

Then this thesis presents another SLAM algorithm-the Relative Map Filter, The RMF is however disadvantaged by the inability to guarantee consistency of the estimated relative map. The following sections introduce a new navigation filter - the Geometric Projection Filter or GPF. The consistency of the estimated relative map is enforced by the application of the constrained estimator to an inconsistent relative map produced by a standard RMF.

然后介绍了SLAM问题的结构，分析了绝对地图滤波器的性质，介绍另一种解决方法—相对地图滤波器，但是相对地图滤波器产生不一致的相对地图，因此在相对地图滤波器的基础上应用约束估计产生一致的相对地图，这就是几何投影滤波器，从而有效的解决了SLAM问题。

The squished rainbow squares can be roughly fixed by scaling the cylindrical map projection in 'Y'.

彩虹广场的挤压，大致可以修复缩放'的圆柱形地图投影Y键。

The type of map projection has diverse.

地图投影类类长样。

This paper systemically elaborates map projection and map projective transformation.

1引言如何将地球空间信息通过一种数据交换表现在平面中，是地图投影研究的范畴。

In this paper, the author introduces component and OpenGIS including the specification of Spatial Reference System Components —Interfaces and Classes. After analyzing and comparing several methods of map projection transformation, the author chooses the inverse transformation method as the main one.

本文首先介绍了组件技术和OpenGIS规范及其有关空间参照系统的接口和组件对象的定义，在对几种地图投影变换方法进行分析比较之后，选择反解变换法作为主要方法。

You can almost say that the "opposite" of the Plate Carree is the Mercator projection which stretches areas close to the poles in the opposite direction, making them look very big.

这种投影造成了严重的地图变形，使两极方向的面积被压扁了。墨卡托投影可以认为是这种投影的反面，因为墨卡托投影下两极方向的面积被放大了。

In a Mercator projection, the north and south poles are spread out, resulting in a map with equally spaced longitudes and latitudes, and a constant compass bearing.

在麦卡托投影（一种制作地图中所采用的投影方式）中，南北两极会被拉伸，使得地图具有相等的经纬度间隔，和固定的罗盘方位。

Main works in this paper include:(1) Studies on pipelines network underground" spacial data model and data structure;(2) Analysing and extracting the data of cities" pipelines network underground;(3) Methods of development with OpenGL in VC++;(4) Measures of pipelines network undergrounds realizition, such as division of map layer, foundation of coordinate system, real-time roaming about and so on;Finally, works that has been done in this paper is summarized, and prospect of the problems should be gone deep into in future is made, integrated with the experience and deficiency in this paper.

论文所做的工作主要有：(1)地下管网空间数据模型与数据结构的研究；(2)管线源数据的分析与提取；(3)地下管线可视化的方法，例如图层划分、坐标系的建立、地图投影的定义、漫游中的实时处理技术以及地下管线的3D几何造型技术等；(4)VC++中OpenGL开发和运用的方法；最后对本课题所完成的实际工作和所取得的结论性成果进行了概括和总结，结合在研究过程中的体会和不足，对以后的研究中需要进一步深入研究的几个方面做了一个简单的展望。

And this paper researches projection ways of coordinate such as the Mercator projection, Lambert projection and linear projection to achieve the conversion of level rectangular coordinate by latitude coordinate and geography.

研究横轴墨卡托投影、兰勃特投影以及线性投影等其它坐标投影方式，实现地理经纬度坐标到平面直角坐标的转换，支持多比例尺地图。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。