投影变换

GIS中的地图投影变换

Map Projection Transformation of GIS

最后，采用Visualc++作为软件平台，开发了遥感图像投影变换的模块。

The authors take Visual C + + as software platform and develop the system of raster picture projection transformation .

基于Web服务的地图投影变换

Map Projection Transform Based on Web Services

作者介绍H、V面上的辅助投影变换的原理及作图方法。

The drawing method of aiding projective transformations on H or V is presented .

地图投影变换是地图制图理论的基础，也是GIS的重要组成部分。

The transformation of map projection is the base for mapping theory and an important component of GIS .

嵌入式应用中加速图像投影变换的Cache包围盒方法

A Cache Bounding Box Approach to Speed up Image Projection Transformation in Embedded Systems

阐述了基于Java的GIS地图投影变换子系统的设计和实现方法。

This paper presents a method for designing and implementing the subsystem of GIS map projection transform based on Java .

基于投影变换的Sweep曲面构造方法

The Construction of Projected - Based Sweep Surface

数据管理模块主要是由图形基本操作、数据更新和投影变换所构成；查询模块包括属性查询、SQL查询、图幅号（或图件名称）查询、区域名称查询四种查询方式。

The data management module is mainly constituted by map operation , the data renewal and the projection transformation .

一种基于ERDASIMAGINE的80坐标系栅格数据投影变换方法

An 80 Coordinate System Raster Data Projection Transform Approach Based on ERDAS IMAGINE

OpenGL中的投影变换

Projection transforms of the OpenGL

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。

Map projection transformation of vector data is becoming mature presently , but research and application of raster data projection transformation in GIS needs further efforts .

指出空间数据库不仅仅可以为Web地图服务提供一个数据的存储环境，还提供了基本的GIS分析功能和投影变换的功能，在GIS的应用中应该充分利用这些已有的功能。

The author points out that the spatial database functions not only as a pool to store the spatial data but also provides the basic G1S analysing functions and the project transformation function .

原型系统只提供了一些基本服务组件：注册组件，SRS投影变换组件，Web地图组件，地址匹配组件。

The prototype system just offers some basic service components , such as registration component , SRS projection component , web mapping component and address matching component .

该文基于广义的Fisher线性判别准则，将投影变换、同构变换和压缩变换相结合，解决了这个问题，完善了小样本情况下线性鉴别分析理论。

Based on the generalized Fisher linear discriminant criterion , this problem is solved by combining projection transform , isomorphic mapping and compressed transform .

从矢量分析角度出发，通过对三相电网电压和电流矢量在dq坐标系下进行投影变换，实现谐波和无功电流的提取。

The proposed method extracts harmonic and reactive currents through three-phase voltage and current vectors project transformation in dq coordinate .

首先介绍了用OpenGL显示三维地质模型的几个技术关键，包括模型绘制、投影变换、取景、TIN表面显示、旋转、颜色与材质等。

Some key techniques of OpenGL displaying 3D geological model are discussed , including model drawing , projection translate , scene , TIN surface display , rotation , color and material and so on .

其次，根据非线性投影变换改进了Gauss-Newton法，解决了战术参数非线性估计问题。

Then , improved Gauss-Newton algorithm is proposed to solve nonlinear estimation problem of tactical parameters by means of nonlinear projection transform .

并运用OpenGL的相关函数对生成的地形模型进行透视投影变换、纹理映射等渲染处理，实现纹理映射、三维图形输出、漫游、旋转、缩放等功能。

Use the related functions of OpenGL to conduct screen perspective projection and texture mapping , realize the functions of texture mapping , output of three-dimensional graph , roam , rotation and scaling .

本文提出的三维投影变换及反投影重建，不仅可以应用在放疗计划的设计过程中，也可用在多层CT的成像过程、数字减影等多种三维图像重建中。

This presented 3-D projection transformation and back-projection reconstruction can be applied not only in the program of radiotherapy treatment planning , but also in some 3-D image reconstruction procedures , e.g. , the imaging of multi-slice CT and the 3-D reconstruction of DSA .

根据基于码率分布函数的投影变换自回归（PAR）业务模型，讨论了数字视频接入ATM网络时码率的控制原则。

According to video services model of projection AR ( PAR ) which based on the cumulative probability function , talk over the principle of video bits rate control when digital video over ATM .

本文系统地讨论了等角投影变换的正形变换多项式的理论、方法及其在计算机制图和地理信息系统建设中的若干应用问题，并同时介绍了《等角投影变换BASIC、FORTRAN程序软件包》的有关内容。

In this paper , the theory and method of polynomials for conformal projection transformation and their application in CAC and in the construction of GIS are systematically discussed . Also introduced is the programme package in BASIC and FORTRAN for conformal projection transformation .

常系数计算公式优于传统的变系数计算公式，是基于计算机的等角投影变换的最佳模型，它在计算机制图、地图数据库、GIS等领域中有着广泛的应用。

Constant coefficient computing formulas are better than traditional variable coefficient computing formulas . Constant coefficent formula for conformal projection transformation is the best model for computer calculation . They could be widely applied in flelds of computer cartography , map databases and GIS , ect .

第二，Sweep曲面可以直接用投影变换方法来构造，从而可以避免使用活动标架，进而可以不必考虑脊线的连续性对Sweep曲面形状的影响。

Secondly , the Sweep surface can be directly described by projected transform so we can avoid using the local moving frame , then the limitation of continuity of spine for the local moving frame is not necessary .

将本文选择的多景MODIS影像经过投影变换并计算出植被指数文件，逐日比较植被指数并进行多时相合成，制作出植被指数多时相合成图；

To calculate the vegetation index file from MODIS images which were projected , compare vegetation index and compose the image day by day , make vegetation index large time phases formate and pursue .

为了拓展球极投影变换在数理统计中的应用，采用球极投影变换导出Box-Muller二维变换抽样公式。

The purpose of this study is to use stereographic projection transformation to derive Box-Muller bivariate transformation sampling formula .

该方法首先提取基于区域投影变换形成的边界链码特征，对每个汉字建立4个HMM，通过等比重综合方法将4个分类器的计算结果进行综合，从而得到识别结果。

Combined with the contour chain codes by sub-region projection transform , this method firstly constructs 4 HMMs for each Chinese character , and synthesizes the results of the 4 HMMs by equal proportion method , and then gets the final recognition result .

文章主要针对日本GMS-5展宽数字云图资料，讨论卫星资料的分析、解码、云图信息的处理、投影变换等处理技术。

This paper discusses technologies such as the decode , analysis of satellite information and the processing of cloud atlas information , projection transformation etc. based on the Japanese GMS-5 spreading digital cloud atlas data .

提出了辐射投影变换（RPT），给出了数学模型和实现方法以及相应的投影函数（RPTF）。

An algorithm called Radiant projection transformation ( RPT ) is proposed , and the mathematical model and implementation method , as well as the radiant projection transformation function ( RPTF ) are given , which can be used in the recognition of Chinese character in out of focus image .

本文利用计算数学方法，根据地图投影变换的基本数学原理，提出了一种新的地图投影反解变换方法，双向迭代逼近法（BDIRA）。

The paper provides a new algorithm for map projection reverse transformation , namely , bi-directional iteration reverse algorithm ( BDIRA ), which integrates the advantages of two methods above , and meets the needs for most types of common map projections .