Given the absence of man-made features, particularly buildings, within our study site, it is reasonable to deduce that the disparity between the digital surface model (DSM) and digital terrain model (DTM) represents the height of vegetation. Therefore, to obtain the vegetation height, DTM was subtracted from the DSM.

Vegetation Height = DSM – DTM

This video demonstrate how to use the minus tool to calculate Digital Height Model (DHM) from DSM and DTM