Gps数据的获得及处理，开发环境keil,并将 经纬度等信息时时传给上位机等-PON data acquisition and processing, Keil development environment, such as longitude and latitude will always pass on information such as PC

实用的大地坐标转换中间件，可以进行大地坐标与经纬度、UTM与高斯坐标系的互相转换，支持多种分带方法和换带处理。-practical geodetic coordinates middleware conversion can be carried out with the longitude and latitude coordinates of the earth, UTM coordinates with the Gaussian mutual conversion, support for

中心点距离生成封闭的圆,按经纬度生成40个点的封闭圆。(The distance between the centers creates a closed circle, and a closed circle of 40 points is generated by latitude and longitude.)