降低SRTM3数据点密度

vb开发的GIS电子地图,查询，放大等功能-vb development of GIS electronic map, query, zoom and other functions

本程序为个人GIS地图、路径算法及GPS导航定位的测试程序。主要用来测试GIS环境及算法的可靠和稳定性。-This procedure for individual GIS map, the path algorithm and GPS navigation and positioning test procedures. GIS is mainly used to test the environment and the reliability and stability of algorithms.

用Visual C++开发的一个坐标转换系统大家打开看看就知道了-Visual C development of a coordinate transformation system opened see in the know

这个程序源码实现了mapx的绝大部分功能，非常经典！！并且我增加了一个重要功能，网上有许多人提出了这个功能，但是没有很好的解决。修改后，可以实现图层的动态移动，在创建折线时，当鼠标位于窗口边缘时，图幅自动平移，就像mapinfo一模一样的效果，并非简单的移动视图中心。当然你可以根据需要将功能扩充到在画直线、画多义线、画多边形的时候实现动态移动。具体功能与说明请下载后参阅ReadMeFirst。-the process to achieve the source of most of the functionality MapX, very classic! ! And I added an important function, the Internet has made many of the features, but not a very good solution. After revisions, the layer can be achieved for the dynamic movement, in the creation of dogleg, when the mouse is located at the edge of the window, maps automatic translation, like MapInfo exactly the same effect, is not a simple mobile View Center. Of course, you may need to expand the functions of the painting straight line paintings, the paintings polygon Dynamic Mobile. The specific function and description of downloading information ReadMeFirst.

介绍MO的二次开发的一本好书，对于进行GIS开发的人员很有帮助-MO introduced in the secondary development of a good book, for the development of the GIS staff helpful

ARCGIS一些基本开发操作对初学者有一定的益处-ARCGIS some basic operations on the development must have the benefit of beginners

很好的东东，类似一种压缩的程序，但非常简单，c++更既方便大家的应用-good Dongdong, a similar compression procedure, but very simple, c more convenient your application

CGRID的功能实现,多种功能的结合,为你熟悉CGRID类打下基础-CGRID realize the function, multiple functions, the combination of you familiar with the lay the groundwork category CGRID

一本关于GIS开发的书籍，撰写明细，对于初步了解GIS开发者有启迪作用-one on the development of the GIS books, writing detailed, for a preliminary understanding of GIS developers have inspirations

应用背景15°有限差分偏移建立在波动方程或简化了的波动方程差分基础上的偏移方法。15度偏移差分法实现地震波偏移。反射地震方法是根据在地面上以一定方式进行弹性波激发，并在地面的一定范围（孔径）内记录来自地下弹性分界面的反射波来研究地下地质岩层结构及其物性特征的一种方法。关键技术本代码建立在波动方程或简化了的波动方程差分基础上的偏移方法。常用的有15°差分法和45°...15°时间偏移方程为式中c为波速，τ为以双程时间表示的深度，t，x和P参见“叠前部分偏移”条件。