mapgis二次开发sdk，实例程序，有部分vb程序，献给mapgis二次开发的朋友。...

计算章动 岁差 极移的C++程序 输入北京时间，自动转换儒略日，儒略世纪，并计算章动 岁差 极移等

如何使用MapXtreme+C#在地图上新增加点图元。-How to Use MapXtreme+ C# additional points on the map pixel.

使用ArcObjects实现了shapefile文件、影像文件的加载，图层控制，添加点线面，地图符号化，查询，拓扑运算及空间分析等功能。-The use of ArcObjects realized shapefile file, image file loading, layer control, add the point, line and plane, maps symbolize, query, topological computing and spatial analysis functions.

目前支持autocad中DWG文件读写的源码除了用python写的phythonCAD，恐怕就只剩这个了。可是为什么该站要限定java和C才开通呢，其实有一些其他语言的源码也很经典啊-Currently supports autocad in the source code to read and write DWG files besides using python write phythonCAD, I am afraid the only place this has been. But why the station should be limited to java and C only to open it, in fact, have a number of other languages source code is also very classic ah

利用MO实现了基本的工具条事件和简单的编辑，专题制图，缓冲区分析等-The use of MO realize the basic toolbar and simple editing events, thematic mapping, buffer analysis

基于mapobject和vb的各种功能实现-Based on MapObject and vb realize the various functions

vc实现GIS地图移动位置功能，双缓冲的运用。-vc mobile GIS map location, dual use of the buffer.

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ArcGIS的基本地图图形编辑功能，常用的都有-ArcGIS map graphic of the basic editing functions, commonly used are