Generating DTM Images Alongside Orthomosaic, DEM, and 3D Models

[Dhanraj Jain]

Hello, Agisoft Metashape community,

I am currently using Agisoft Metashape Python API version 1.8.5 to generate orthomosaic, DEM, dense cloud, and 3D models. I've been following the code example provided at https://github.com/agisoft-llc/metashape-scripts/blob/1.8/src/samples/general_workflow.py to accomplish this.

Now, I am looking to expand my workflow and also generate Digital Terrain Model (DTM) images from the same dataset. However, I couldn't find specific information or examples in the documentation or the sample script linked above on how to achieve this.

Could someone please suggest an appropriate solution or guide on how to integrate DTM generation into my existing workflow using Agisoft Metashape Python API version 1.8.5? Any code examples or step-by-step instructions would be greatly appreciated.

Thank you in advance for your assistance!

[Paulo]

Hi Dhanraj,

Here is a suggestion:

- run Classify ground points on your point cloud;
- then generate DTM (no overwrite) using only ground points class.

Voila! it is done...

[Dhanraj Jain]

Hello Paulo,
Thank you for your response. Could you please share a code example for this process? I'm not sure about storing DEM and DTM together or if we need to create a separate chunk for the DTM from the main chunk.
Additionally, I came across the "classifyGroundPoints" function in the Agisoft Metashape Python 1.8.5 documentation; is this the function you are referring to?