这是一篇关于工程土方计算DEM法探讨的论文，功能比较完善，可以作为初学者的参考...

半个GIS系统 只是开始-half a GIS system is only the beginning

一个开源面向对象通用地图投影程序，支持多种地图投影算法。-An open source object-oriented common map projection procedures, supports a wide range of map projection algorithm.

在VC中利用MAPX实现各种性质的图层的使用，其中不包括细化图层。-in VC Connection use of various layers of the nature of the use, which does not include the thinning layer.

用Mapx计算两个叠加图形的重叠部分的面积-MapX calculated using two superimposed graphics part of the area of overlap

OPEN-GL应用,三维地图演示系统，包含OPEN GL功能,GIS演示。-Open-GL Application, a 3-D map demo system. Includes the openGL , GIS demo.

VB6.0+MAPX开发原理-VB6.0 Connection Principle Development

包括部分空间算法，如计算两坐标点距离、判断两坐标点是否相等、计算叉积、计算点积、判断点p是否在线段l上、计算点bp以点op为圆心逆时针旋转dAlpha(单位：弧度)后所在的坐标点位置、计算指定半径圆上指定角度的弦长、计算由起点坐标和终点坐标构成的线段在指定距离和指定方向的垂点坐标等空间算法-Including some space algorithms, such as calculating the distance between the two coordinates to determine whether the same two coordinates to calculate cross product, point multiplication calculation to determine whether point p on line l above the calculation point to point op for bp counterclockwise rotation center dAlpha (units : radian) after the location where the coordinates of points, calculated on the specified radius of a round angle specified chord length, calculated from the starting point coordinates and end coordinates of the line constitutes a specified distance and specified direction of the vertical space coordinate algorithm

本文结合DCT变换的特性，利用分形的Peano一hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵，不直接作二维DCT变换，而是先进行扫描，使之重排成一维向量，再进行一维DCT变换，这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法，并在扫描编码过程中，按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”，而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking

MAPX5.02开发人员指南及CUSTSYMB目录下的全部图标和MAPS目录的全部系统默认地图-MAPX5.02 Developer

E:gisMap ObjectMapObject PDF