8.9.3. Digital Surface Models (DSM) and Digital Terrain Models (DTM)

Try these first

1. 1.

   What does a Digital Surface Model include?

   Hint

   Think about what you see in an urban environment.

2. 2.

   What is a Digital Terrain Model focused on?

   Hint

   What would be left if you removed everything on top?

3. 3.

   What does a Digital Surface Model represent?

   • Only the bare earth surface
   • All surface features including buildings and trees
   • None of the above

   Hint

   Remember the 'S' in DSM for surfaces.

4. 4.

   True or False: A Digital Terrain Model includes vegetation.

   • True
   • False

   Hint

   Think about what a bare ground model means.

5. 5.

   Analyze how incorporating both DSM and DTM could improve flood management strategies in urban environments.

   Hint

   Consider how structures change water flow.

6. 6.

   Critically evaluate a scenario where relying solely on DSM could lead to planning errors. What would those errors be?

   Hint

   Think about the consequences of ignoring ground level.