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鹰眼实现(vb+mapx50)-breath-5, a program file to show that I will be my last set of five procedures is described.

Visual C++开发GIS系统(陈建春)附书光盘，里面包含本书全部完整源代码。-Visual C development of GIS (Chen Jianchun) attached CD, which contains all of the integrity of the source code.

vb+Mapinfo开发之最短路径，同时还有SQL查询等功能-vb+ Mapinfo development of the shortest path, along with features such as SQL Query

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

Class Shortest models a shortest path calculation between two registered users.

Terrain_example_source：生成3d地形的代码，对开发GIS等有帮助。-Terrain_example_source : 3d terrain generated code Development of GIS and other help.

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

this tool created with arcgis server adf

MapObject VISUAL BASIC

应用背景物理大地测量学中，经常用到两点间的方位角，已知球面两点大地经纬度坐标，求解两点间的球面方位角。假设地球为球形进行的计算。关键技术通过两点的大地经纬度坐标，计算两点球面坐标方位角。需要输入文件INPUT，输入格式 纬度 经度 大地高（或正高），可以是一组数据也可以是连续的多个数据，排列顺序是按列三列数据。计算出的方位角是以第一个点到第二个点的方位角。例如，假如序号为1,2,3,4……。那么求出的方位角为α1-2，α2-3，α3-4……。输出文件为fangweijiao.dat