章动岁差计算

读取Mapgis源码文件: *.wal, *.wat, *.wap等的IDL源程序.读完后生成IDL图形对象.-Read Mapgis ascii code files,*.wal,*.wat,*.wap. and then create IDL objects

第六个RAR MAPGIS 二次开发教程共6个RAR这是其中的第六个-RAR MAPGIS sixth secondary development of a total of 6 RAR Guide This is one of the sixth

创建空间索引结构R树的源程序，解压后的文件中有readme文档。-create spatial index R-tree structure of the source, the paper after extracting a readme file.

用openGL调用ERIS的*.shp格式的地图文件-ERIS with openGL call of the*. shp format map files

包括部分空间算法，如计算两坐标点距离、判断两坐标点是否相等、计算叉积、计算点积、判断点p是否在线段l上、计算点bp以点op为圆心逆时针旋转dAlpha(单位：弧度)后所在的坐标点位置、计算指定半径圆上指定角度的弦长、计算由起点坐标和终点坐标构成的线段在指定距离和指定方向的垂点坐标等空间算法-Including some space algorithms, such as calculating the distance between the two coordinates to determine whether the same two coordinates to calculate cross product, point multiplication calculation to determine whether point p on line l above the calculation point to point op for bp counterclockwise rotation center dAlpha (units : radian) after the location where the coordinates of points, calculated on the specified radius of a round angle specified chord length, calculated from the starting point coordinates and end coordinates of the line constitutes a specified distance and specified direction of the vertical space coordinate algorithm

axl解释和生成-interpretation and generation

就纸质地图等高线计算机自动提取展开讨论，结合计算机图形学、图像处理和模式识别等理论，提出了一套基于VC++开发平台的 具体实现算法。实验表明该方法获得了比较满意的提取效果，可以在GIS和军用仿真领域中进行推广。-on paper maps, contour lines from the computer automatically begun discussions with computer graphics, image processing and pattern recognition theory, a VC-based development platform to the specific algorithm. Experiments show that the method was quite satisfied with the extraction, the GIS and military simulation area for the promotion.

ArcGIS Engine二次开发编程实例，里面有许多有用的例子！-ArcGIS Engine secondary development of programming examples, there are many useful examples!

gis学习很重要！如果你喜欢建议你学一下！值得！大家一起学啊！-dsfsjfskfjsklfjsflskfl

VB+MAPOBJECTS开发GIS软件的例程,是初学者入门的好资料 -VB MAPOBJECTS development of GIS software routines is a good beginners information portal