🌳 How to Use DSM (Digital Surface Model) Tools

📂 Step 1: Open the DSM Menu

• On the left sidebar, click DSM.

• The menu will show what types of trees exist in your project.

🌲 Step 2: Understand Tree Assumptions

Two assumptions are applied to trees by default:

1. Attenuation inside the trees.

2. Opening underneath the canopy.

📚 Step 3: Select or Customize Tree Types

• Use the built-in tree database to select a type.

• Or, create a custom tree type with your own parameters.

🏞️ Step 4: Modify DSM Height in 3D

1. Switch to 3D View to see the existing trees or terrain.

2. Switch back to 2D View if you want to make modifications.

✏️ Step 5: Flatten an Area

1. In DSM tools, click Modify DSM Heights.

2. Choose a drawing tool (e.g., Scribe or Rectangle).

3. Draw a closed polygon around the target area.

4. Set DSM height = 0 (flatten).

5. Click Save → the selected area becomes flat.

⛰️ Step 6: Raise an Area

1. Go to 2D View → DSM tools.

2. Draw a rectangle over the area.

3. Set DSM height (e.g., 40 ft).

4. Click Save → the area is raised to the new height.

🔄 Step 7: Reset to Original DSM

• To restore the project:

  1. Click Modify DSM Height.

  2. Select Reset to Original DSM.

  3. All changes revert to the original terrain data.

✅ You can now control tree effects, flatten surfaces, raise terrain, or restore DSM data to its original state.