世界地图等差分纬线多圆锥投影的正反解变换

NORMAL AND INVERSE SOLUTION OF EQUIVALENT DIFFERENCE LATITUDE PARALLEL POLYCONIC PROJECTION OF WORLD MAP

由于国家测绘局在网上正式发布的《世界地图》没有给出具体的投影参数和正反解变换公式,用户使用不方便。导出了等差分纬线多圆锥投影的正反解变换公式,用户可以通过选择参考点,利用参考点的坐标值计算投影参数,然后根据该公式对地理信息进行坐标转换,将各类点、线、面的地理信息投影到地图上。

As the world map which is published on the net by State Bureau of Surveying and Mapping has no the concrete projection parameters and the normal and inverse transformation formulae, it is difficult to project the geo-information to the map. We derived the formulae of the normal and inverse solution of equivalent difference latitude parallel polyconic projection. Throught choosing the reference points, and computing the projection parameters from the coordinate values of reference points, people can make the transformation of geo-information according to the normal and inverse transformation formulae, and project the dots, lines or panels to the map easily.