多重加密格网内插法坐标转换

Multiple encrypted grid interpolation coordinate transformation

我国CGCS2000坐标系启用后,各地均面临着大批量、多类型、多坐标系成果数据坐标转换的需求,而国家大地坐标系、地心坐标系及独立坐标系之间的转换参数属于绝密级别,保密要求高,因此给实际应用带来了困难。顾及与参数法坐标转换成果的一致性及数据的安全要求,本文提出了多重加密格网内插坐标转换方法,研制了适用于多种数据格式的二/三维格网坐标转换软件,并将该算法应用于CORS服务,通过实例验证了该方法的可靠性与实用性。

After implementing CGCS2000 in China,massive amounts of surveying and mapping data in multi-coordinate-system and multi-format need to be coordinate transformed in many places.In practice,the top secret transformation parameters bring great difficulties to the practical application,which among geodetic coordinate systems,ellipse-centered coordinate systems and the local independent coordinate systems.Considering the security and consistency of the parameter coordinate transformation,a multiple encrypted grid interpolation coordinate transformation method is proposed in the paper,and developed into the coordinate transformation software based on two and three dimensional grid data.The method has also been applied into the ZHBDCORS.Actual verification shows that the method has the high safety and practicability.