Troubleshooting “Unable to Cluster Toe Line” in Auto Toe Extraction

📌 Problem

When running the Auto Toe Extraction on the Volume tab or the Auto Toe Extractor Point Cloud Task (PCT), you may encounter:

Error: “Unable to cluster toe line”

🔍 Root Cause

This means the tool could not generate a continuous toe polygon for the stockpile. The toe defines the volumetric base, so failure to cluster prevents automatic extraction.

• Insufficient or noisy point density near the pile base.
• Poorly defined stockpile boundaries (vegetation, adjacent slopes).
• Parameter settings too restrictive (grid size or minimum vertical change).
• Incorrect input point filter (e.g., excluding Ground Class 2 points).

✅ Probable Resolutions

1. Verify Point Cloud Quality

• Ensure ground points are classified.
• Include Class 2 (Ground) points in Input Points Filter.

Screenshot:
(Insert screenshot of Input Points Filter dialog showing Class 2 selected)

2. Adjust Auto Toe Extractor Parameters

Screenshot:
(Insert screenshot of Auto Toe Extractor settings panel with highlighted Grid Size and Minimum Vertical Change fields)

3. Exclude Overhead Points

Remove conveyors, vegetation, or other objects interfering with toe detection.

Screenshot:
(Insert screenshot showing point cloud with overhead objects removed)

4. Manual Fallback

If automatic clustering fails repeatedly:

• Use the Draw Area Feature tool and the Feature Edit Tools to digitize the toe manually.
• Heads-up digitizing ensures accurate volumetric base definition.

Screenshot:
(Insert screenshot of manual toe digitizing workflow in LP360)

Best Practices

• Digitize the seed point near the top of the pile before running the tool.
• Confirm the Active Area Layer.
• For complex terrain or adjacent slopes, manual toe editing is often necessary.

Quick Checklist

✔ Include Ground Class points
✔ Adjust Grid Size and Minimum Vertical Change
✔ Remove overhead objects
✔ Use manual digitizing if automatic fails

📚 Additional Notes

• LP360 Training Guide: Volumes of Dirt Piles and Catchment Basins
• LP360 Support Articles: Auto Toe Extraction settings and troubleshooting
• Compute Volumetrics Presentation: Importance of toe delineation

📬 Need Help?

If you're still stuck, please Contact Support for assistance.