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My question is regarding the point cloud classification and editing work for a photogrammetric point cloud generated using drone based imagery.

My objective is the generation of a digital elevation model from the point cloud.

The terrain has high vegetation and relief with few ground points scattered across the terrain. Using auto ground classification tools aren't giving sufficiently accurate or satisfactory results.

I'm looking for specific workflows using open source/proprietary toolkits for classification and editing of the same.

Kindly make some suggestions on the same.

Attached along is the sample snapshot.

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