Chunk workflow for topography NEED HELP!

[Joel Cast]

Hello everyone, I've been using Agisoft for a while for land surveying. I've never had to deal with merge chunk or split chunk before. However, I would like to be able to perform manipulations that require these operations. I've watched some videos, but it never works or only partially. Let me explain: I need to update certain maps that have changed over time to get the correct levels for calculations, etc. I have two almost identical drone flights referenced with GCPs. I cut out a dense cloud where the terrain has changed – simplifying it, I create a polygon and delete the points inside. This results in the first photo attached.

In my second project, I import the polygon from the first project to the second cut and keep the data of the desired surface (photo 2). Then I align chunk / merge chunk, and it worked only once with the point cloud (photo 3), but no mesh, etc. When I create the texture or the model, it patches the hole. In short, I spent the day working on it.

For the Chunk pros, could you explain to me or direct me to the right methods to perform this kind of work?

Thanks ALL

[Alexey Pasumansky]

Hello Joel,

What parameters have you used in Merge Chunks dialog and what assets were present in both chunks (dense point cloud, mesh models, tiled models and etc.)?

And please elaborate, what final result do you need to achieve in the merged chunk - only merging some assets from the source chunks, or rebuilding mesh, for example, from the merged point cloud?