are commonly used for quantifying topographic changes at various scales and in this context, the reproducibility of the is an important issue:

Digital terrain models $($DTMs$)$ of differences $($DoD$),$ DTM

Digital surface models $($DSMs$)$ of differences $($DoD$),$ DSM

Digital elevation models $($DEMs$)$ of differences $($DoD$),$ DEM

Digital height models $($DHMs$)$ of differences $($DoD$),$ DHM