地图投影

The purpose of the map, then, determines which projection should form the base for the map.

也就是说，地图的使用目的决定了地图应该采用的地图投影。

Analyze the projection method and space Cartesian coordinate system. It focuses on conversion between different coordinates.

对地图投影中的投影方式以及采用的空间直角坐标系统进行分析，其中重点介绍了投影坐标与地理坐标、地理坐标与空间直角坐标以及空间直角坐标之间的转换问题。

One way of describing a projection is to project first from the earth's surface to a developable surface such as a cylinder or cone, followed by the simple second step of unrolling the surface into a plane.

描述地图投影的一种思路便是：首先将地球表面投影到一个可展面上，然后再简单地将这个可展面展开为一个平面。

Of its research mainly includes the preparation of maps, map projection, map finishing, map printing.

其研究内容主要包括地图编制、地图投影、地图整饰、地图印刷等。

As an important part of GIS platform, spatial reference system includes coordinate transformation and map projection, also named as Map projection transformation system.

GIS中的空间参照系统是GIS平台中的重要组成部分，内容包括各种坐标系统的转换和地图投影，故也称为投影变换系统。

It's obviously that it's not practical if you use such broken and wrinkled plane mapping. So we must adopt special methods to spread the curved surface, which is called map projection theory.

若用这种具有破裂或褶皱的平面绘制地图，显然是不实用的，所以必须采用特殊的方法将曲面展开，使其成为没有破裂或褶皱的平面，于是就出现了地图投影理论。

A map projection in which quadrilaterals formed by meridians and parallels have an area on the map proportional to their area on the globe.

由子午线形成四边形并且把地球上的领域相应的投射在地图上形成的地图投影图。

Map projection ; inverse transformation ; map projection system ; map projection parameters ; algorithm optimization ; error control

地图投影；反解变换；投影体系；投影参数；算法优化；误差控制

In the era of satellites, space projection has open another new horizon for map projections.

自从人造卫星出现之后，又为地图投影学开辟了一个崭新的研究领域，那就是太空投影之间世。

To solve this problem, it is necessary not only to consider the relationship caused by the difference of the method of projection, by that of the elements of ellipsoids and by that of the original data between the new and the old coordinates, but also to consider the observation errors caused by the two measurements.

解决这一问题必须考虑两种坐标间投影方法、椭圆体元素、起算数据等不同所引起的数学关系，而且还必须考虑到两次测量所引起的测量误差。本文所提出的数学模型确保以上所述数学关系准确，在此条件下，采用最小二乘法，使得由于地图投影等因素和测量误差所引起的新、旧坐标间的差异，一次加以处理。

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。