应用背景从SRTM3网站上下载下来的数据，点密度太大，给使用带来不便，程序目的是降低点密度，使其分辨率降低，通过相邻点删除的方式，使其分辨率降低，但仍然保持原来点方阵的格式，例如，原来是n×n，即n行n列，降低密度后，变为原来的一半。n/2*n/2，即n/2行，n/2列。如果n为偶数，则n/2=int（n/2）+1关键技术 程序分两个 separate_jshu.f 和 separate_oushu.f 。输入文件分别为 Input_jshu.dat 和 Input.dat. 即，当原文件 n×n中n为奇数时，使用前一个程序，新生成的文件为 jishu.dat. 新生成行列为 n/2=int（n/2）+1。当原件n×n 中 n 为偶数时，使用后一个文件，新生成文件为 oushu.dat 新生成行列为 n/2.

SVG2MIF is a tool that converts SVG vector drawings to a MIF/MID GIS layer. It allows that manual digitization with opensource vector drawing tools can be imported into opensource GIS software. -SVG2MIF is a tool that converts SVG vector drawings to a MIF/MID GIS layer. It allows that manual digitization with opensource vector drawing tools can be imported into opensource GIS software.

地理信息系统讲义之二!-GIS lectures bis!

Delphi GIS 电子地图信息系统商业源码-Delphi electronic GIS map information systems business FOSS

mapxtreme2005初学代码～ 和数据库之间的链接，及简单工具应用-~ mapxtreme2005 beginner code and database links between, and the application of simple tools

基于MO实现ADO数据库的连接，访问与显示输出。速度比DAO快很多。-MO-based realize ADO database connectivity, access and display the output. Speed much faster than the DAO.

一个计算面的平均高程的程序，可以求得任意形状的面的平均高程。-A calculation of the average surface elevation of the procedure, you can find any shape of the average surface elevation.

不用注册就可以完成各种常用的地图投影：UTM、Albers、高斯、兰勃特、墨卡托等几十种投影，以及它们之间的相互转换；数据处理方式多样：单点、多点、文件方式；椭球可选；注册后功能更多。 -Registration can be completed without a variety of commonly used map projection: UTM, Albers, Gauss, Lambert, Mercator, etc. dozens of projection, and their mutual conversion data processing and diverse ways: a single point, multi-point , paper ellipsoid optional register more after the function.

excel转mapgis+属性挂接，视频讲解如何由 excel转换至MapGIS进行属性挂接-excel switch mapgis+ attributes articulated, video on how to convert from excel to attribute articulated MapGIS

mapobjects VB development maybe very useful for first MO developer