The DEMs were constructed based on Lunar Reconnaissance Orbiter (LRO) Narrow Angle Camera (NAC) images using shape from shading constrained by lower-resolution stereo data. They have been introduced in the following publication, where more details can be found:

 

F. Zhang, J. W. Head, C. Wöhler, R. Bugiolacchi, L. Wilson, A. T. Basilevsky, A. Grumpe, Y. L. Zou.

Ring-Moat Dome Structures (RMDSs) in the Lunar Maria: Statistical, Compositional, and Morphological Characterization and Assessment of Theories of Origin.

Journal of Geophysical Research: Planets, 125, e2019JE005967. https://doi.org/10.1029/2019JE005967

 

The file format of the DEMs is GEOTIFF, the pixel values indicate evelations in meters. The DEMs are numbered as in Table 1 of the paper.