地球经纬度输入（转换）控件，需要使用本人已上传的另一个控件NumEdit。 自己可以添加方法以支持更多的地理坐标转化-Earth coordinates input (conversion) controls, the need to use I have uploaded another NumEdit controls. Their methods can be added to support more into the geographic coordinates

地球坐标系ecef坐标与地理坐标系(bj54/wgs84)转换。-Ecef coordinate system and geographic coordinates (bj54/wgs84) conversion.

基于MAPgis和C#开发的一个小的示例程序供大家参考 具体功能是实现地图的地球坐标和大地坐标的相互转换，-For your reference specific functions based on a small sample program MAPgis and C# developers achieve Earth coordinates and geodetic coordinates map conversion