18.6.3. Digital Elevation Models (DEM/DTM)

Try these first

1. 1.

   What does DEM stand for?

   Hint

   Think about elevation.

2. 2.

   What is a DTM mainly used for?

   Hint

   Focus on 'bare earth'.

3. 3.

   What does a Digital Elevation Model primarily represent?

   • Only bare earth
   • Natural and built features
   • Vegetation only

   Hint

   Consider what the model captures.

4. 4.

   True or False: A Digital Terrain Model shows vegetation.

   • True
   • False

   Hint

   Focus on what DTM includes.

5. 5.

   Create a hypothetical scenario where a civil engineer would choose a DEM over a DTM for a project. Describe the project and explain why the DEM is necessary.

   Hint

   Think about the features you’d want to capture.

6. 6.

   Discuss a situation where using a DTM would be essential for environmental assessment, and explain how it benefits analysis.

   Hint

   Focus on what DTM captures and its relevance to the environment.