Choosing DEM in France?

What is the best Dem resolution?

The one-meter DEM is the highest resolution standard DEM offered in the 3DEP product suite. Other 3DEP products are nationally seamless DEMs in resolutions of 1/3, 1, and 2 arc seconds.

What is the most accurate DEM data?

The DSM dataset has a horizontal resolution of approximately 30-meter mesh (1 arcsec) and is available to the public for free. Based on the DSM dataset (5 meter mesh version) of the World 3D Topographic Data—the most precise global-scale elevation data with world-leading precision of 30 meters.