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Standard procedure

This page describes the standard workflow for reconstructing a breakwater from a point cloud: cloud preparation, automatic detection, quality control and delivery.

1. Cloud cutting

For photogrammetry and bathymetry clouds:

  1. Cut the cloud by block size (volume).
  2. Then split into sub-parts p1, p2, … to get sections of 500 m maximum.
  3. Keep for each zone the full cloud before the pX cutting — it will be used for the final render.

Mandatory overlap

Always keep an overlap between two clouds when a cut is made, otherwise it can cause errors during processing.

Stick to the naming convention for cut clouds.

2. Automatic reconstruction

  1. Create a local project mirroring the same folder structure as the shared folder.
  2. Run the automatic block detection (action Find blocks in a point cloud of the Import module).
  3. Several detections may run in parallel in distinct CloudCompare instances.
  4. Run a first filtering of the detected blocks by their score (action Filter blocks of the Edit module).
  5. Copy the resulting JSON to the shared folder following the structure naming convention.

3. Manual reconstruction

  1. Create a local project mirroring the shared folder structure.
  2. Carry out the manual work with the CloudCompare + SEABIM Editor interface. Only add blocks if there is no doubt about the position.
  3. Verify with a final render including diff, density and overlap (modules Quality control + Filters) and adjust if needed.
  4. Copy the JSON to the shared folder following the naming convention.

4. Verification

Once every sub-part has been processed:

  1. Merge the models of the different parts (bathy + photog, different block sizes).
  2. Run a final render integrating diff, density and overlap.
  3. Adjust if needed, making sure to use the right cloud when re-editing manually.

Points of attention

Pay particular attention to the interfaces between different volumes, the waterline, the berm and the toe.

5. Final render

  1. Reindex the blocks (action Rename blocks with prefix (Batch) of the Metadata module).
  2. Run the final render with the desired filters via the Export final render action of the Export module.