GPS坐标转换算法，将地理坐标转换为空间坐标，方便计算-GPS coordinates conversion algorithm, the geographic coordinates into space coordinates to facilitate the calculation

项目用到的STM32F103芯片的触摸屏SPI接口读取操作，坐标转换及校正都标准得非常好，直接移值绝对可以用(The STM32F103 chip's touch screen SPI interface is used to read the operation. The coordinate conversion and correction are all very well standard, and the direct shift value can be used absolute