Coordinating transformation between image of GIS data and geodetic coordinates is problem frequently met in processing of remote sensing images

which involves a contradiction between processing speed and conversion accuracy. To solve this contradiction

a new algorithm which introduces a new conception of Index Array is developed base on analysis existing methods of registration

which can be used to retrieve pixels of corresponding coordinates directly and avoid heavy computation need by traditional searching. This algorithm is characterized of quick accurate transformation between the two coordinates

and allows real-time superposing geographical info

such as geographical coordinates and boundaries

on real time received remote sensing images which proves to be correct by experiments in MODIS real time data receiving.