A DEM (digital elevation model) of Difference (DoD), is the result of DEM differencing. DEM differencing is the simple act of subtracting the elevations of an older DEM from the elevations a newer DEM on a cell by cell basis:
DoD Figure from Bangen & Wheaton (2012)
This video lecture covers the basics of DEM Differencing:
- For more information, see pages 59-61 of in Chapter 3 of:
- Bangen SG and Wheaton JM. 2012. CHaMP Crew Variability:
Influence on Topographic Surfaces & Derived Metrics, Report to Eco
Logical Research, Inc. and the Columbia Habitat Monitoring Program,
Logan, Utah, 79 pp.