This documentation on SI47xx chips with registers and programming description

空间索引，，，很有帮助，可以学习学习 -space index, and helpful, can learn from

中国矢量电子地图shshape格式用于GIS二次开发地图，如MapObjects，MapX等二次开发地图~

此程序可以进行大地测量坐标和白塞尔坐标进行转换，有利于我们测量的进行。

针对Mapinfo平台的开发源码-against Mapinfo open source

环保模型，包括水污染模型，大气污染模型及爆炸模型，基于ArcGIS Engine开发。-Environmental models, including water pollution model, air pollution models and explosion models, based on ArcGIS Engine development.

MAPX开发手册-Connection Development Manual

一个用VB和MO实现的简单的查询系统，可以实现放大、缩小、图层控制以及图形和属性的查询-using VB and an MO to achieve a simple query system, can achieve amplification, narrow, layer control, and graphics and attributes of inquiries

读取ESRI公司Shapefile格式的源代码-read ESRI Shapefile format of the source code

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

生成tin（不规则三角格网）的算法，根据区域的有限个点集将区域划分为相等的三角面网络-Generation tin (irregular triangular grid) algorithm, according to the region will be a finite number of points equal to the region is divided into triangular surface network