Research has shown that the gravity corrections’ calculation caused by the influence of material masses, are located higher than datum ellipsoid, desirable to perform within the complete topographic reduction. For these purposes, we had built the global digital elevation model of the Earth (GDEM-SSGA) with elevation values in the net nodes, net’s cell size is 5 angular minutes by latitude and longitude for the territory of Russia (up to the 60th parallel), and 1 degree – for the rest of the Earth’s surface.