VB+ Connection program, the common GIS functions

应用背景在物力大地测量学中，重力异常的计算，需要测量计算点的重力值和计算测量点的正常重力。计算正常重力时，需要已知计算点大地坐标，即经度、纬度和大地高，如果采用GPS采集数据，那么获得的大地坐标的参考椭球是WGS84。关键技术此程序，采用WGS84参考椭球参数，因此输入数据为WGS84大地坐标，顺序为，纬度、经度、大地高。输入文件为，Input.dat。输出文件为，output.txt。计算结果为，椭球面以上高程为h处的正常重力。如果将大地高设为0，那么计算结果为此点处参考椭球面上的正常重力。

从GPS 技术的定位理论出发, 结合基于GPS 技术的车辆监控管理系统来介绍GPS 接收机与GIS 信息软件 之间的通信原理。并利用M ap InfoM asX 控件在V isualBasic 开发环境中实现了GPS 信息的接收与在GIS 中显示接 收信息的程序设计, 从而示范了常见GPS 应用的主要开发过程和关键部分技术实现细节-From the GPS positioning technology, theory, combined with GPS-based vehicle monitoring and management system to introduce the GPS receivers and GIS software, the communication between the information theory. And use M ap InfoM asX control in the V isualBasic development environment to achieve the GPS information displayed in the reception and receive information in the GIS program design, which demonstrated the common GPS applications, the major part of the technology development process and key implementation details

操作MapX的函数-operation function MapX

MapObject Jave Applet源码-MapObject Java Applet FOSS

GPS控制网优化设计源码GPS控制网优化设计源码GPS控制网优化设计源码GPS控制网优化设计源码GPS控制网优化设计源码GPS控制网优化设计源码

vc+ArcEngine建立框架程序:制作浮动可变大小的控制窗口，可以实现图层拖放-vc+ ArcEngine procedures for the establishment of the framework: the production of a floating variable to control the size of the window, you can drag and drop layers to achieve

首先安装MapX控件，该实例能够实现地图标注，缓冲区查询分析，图层控制管理等主要功能。-first install MapX, the case can be achieved marked maps, a buffer for analysis, control and management layers main functions.

这是两年前做的东西，刚刚开始学习gis时导师布置的一个作业：莫霍面的一些分析处理！对初学者有用，呵呵～里面有坐标系的关键转换技术，自己建的数学模型自己实现，还有配套的文章发表，呵呵～-That was two years ago so things just started learning gis instructor at the layout of a work : Moho some analysis! Useful for beginners, Ha ha ~ coordinate system with a key switch technology, to build the mathematical model for achieving his, also supporting the article was published, Ha ha ~

测试坐标换算VC,WGS84,BJ54,BL->XL->BL-testing coordinates conversion VC, WGS84, BJ54, BL-

AO开发六种专题图的代码。可为初学者提供一定的借鉴。也可为具有一定基础的提供范例-AO develops six kind of special charts the code. May provide the certain model for the beginner. Also may for have the certain foundation to provide the model