Canopy height models are a measurement of the height of trees, buildings, and other structures above the ground topography.
This product is used in a variety of forestry applications including tracking vegetation and trees in a forest over time, calculating biomass, and estimating leaf area index.
A canopy height model is calculated by subtracting the digital terrain model (DTM) from the digital surface model (DSM).
A DTM refers to the bare earth (ground surface)
DSM measures the elevation of the top of a landscape including vegetation and buildings.