weipoint_to_polygon

从下往上划出的效果demo，精选ios编程学习源码，很好的参考资料。(From the demo effect to draw on, select learning IOS programming source code, a good reference.)

一款基于iOS的图表的demo，用图表（包括折线图和饼图）的形式显示数据。(A graph based on iOS demo, use a chart (including line charts and pie charts) displayed in the data.)

将大地坐标转换到大地空间直角坐标，即将大地纬度，大地经度，大地高转换到X,Y,Z,采用的是克拉索夫斯基椭球(Will the earth coordinate transformation to the space rectangular coordinate, the earth is the latitude and longitude of the earth, the earth high transition to the X, Y, Z, USES a carat SuoFuSi ellipsoid)

说明：  实现A*算法地图寻优路径问题，游戏地图采用网格地图。(Achieve A* algorithm maps the path optimization problem, the game map using a grid map.)

经纬度坐标转换为SIN投影坐标，在处理SIN投影的遥感图像时可以用(The the SIN projection coordinates into latitude and longitude coordinates, in the processing of the SIN projection remote sensing image can be used)

说明：  地图代数实习2代码，二维距离场变换，右上和左下扫描图片(Map algebra practice 2 code, two-dimensional distance field transformation, upper right and lower left scanning pictures)

使用ogr进行intersect空间运算，结果导出excel(ogr intersect c++ gdal excel)

This callback can control port power instead of DVSTCTR register.

基于VISUAL c++的电子地图管理系统，具有读取文件、排序、检索、更新、退出功能，注意，测试时需将程序放在D盘使用，或者将内部的.dat文件放在D盘。(Electronic map management system, has read the file, sort, retrieve, update, exit feature)

显示dwg文件缩略图的C++源码，简洁好用。(Show the dwg file thumbnails C++ source.)