---
title: 🌳 How to Modify DSM and DTM in an Outdoor Project
description: Use the DSM menu to adjust trees, flatten terrain, change surface elevations, or restore the original outdoor model.
---

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# 🌳 How to Modify DSM and DTM in an Outdoor Project

## Use the DSM menu to adjust trees, flatten terrain, change surface elevations, or restore the original outdoor model.

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### 🧭 Step 1: Open the DSM Menu

- In your **outdoor project**, open the **DSM** menu.
- Switch to **3D View** to inspect the environment.
- You’ll be able to see: 
    - **Trees**
    - **Terrain elevation changes**
    - Areas where the surface height varies

---

### 🌲 Step 2: Modify Tree Behavior

You have two ways to adjust trees:

1. **Change the tree type** 
     - Update the balance between **trunk and canopy**
     - Adjust **attenuation inside the canopy**
2. **Remove trees entirely** 
     - Use **Modify DSM Heights**
     - Draw a custom area around the trees
     - Set the height to `0`
     - Click **Save**

This removes the trees from the selected area.

---

### 🔄 Step 3: Restore Original Trees

- To bring removed trees back: 
    1. Go to **Modify**
    2. Select **Reset to Original**
- The original DSM data is restored.

---

### 📏 Step 4: Measure Terrain Changes

- Turn on **Measurements** to understand the existing terrain.
- This helps you identify: 
    - Lowest elevation points
    - Height differences across the selected area
    - Areas that may need flattening or adjustment

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### ✏️ Step 5: Flatten or Adjust Terrain

1. Draw an area over the part of the terrain you want to modify.
2. Review the existing elevation range.
3. Enter a new target elevation value.
4. Apply the elevation change.

The selected area will update to the new height.

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### 🏞️ Step 6: Verify the Change

- After applying the new elevation, the terrain in that area becomes: 
    - **Flattened**, or
    - Adjusted to the height you specified

Use **3D View** to confirm the result visually.

---

### 🔁 Step 7: Reset Terrain to Original

- To restore the original terrain: 
    1. Open the **Modify** options
    2. Select **Reset Terrain**
- The area returns to its original elevation profile.

---

✅ You can now use the **DSM menu** to control both **vegetation** and **terrain elevation**, making it easy to model cleared land, flattened surfaces, or updated site conditions.

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