RuDTM2014: New digital terrain model for Russia and its effect on the prediction of mean gravity anomalies

A new digital terrain model for Russia and surrounding area (16° < lon < 195°, 37° < lat < 82°) was created from two different datasets. The main source was the Digital Elevation Model (DEM) from digitized topographic 1:100 000 scale maps with a resolution of 1 arcsec and the second source was the DEM obtained from the Shuttle Radar Topography Mission (SRTM) with a resolution of 3 arcsec. The final RuDTM2014 has a resolution of 1 arcsec.

The sources and the final RuDTM2014 were compared with the normal heights of more than 100 000 points of the classical astro-geodetic network and with over 5000 GNSS/Leveling benchmarks with both known geodetic and normal heights. Both comparisons are independent, but showed good agreement with each other.