How to locate the corresponding 3d points of a pixel region of orthomosaic?

[JimXu]

Hi, I have make a orthomosia of a scene, I want to analysis a part of the 3D model, which corresponding to a region of orthomosaic.

[JMR]

I think this could work only if a DEM exists. Draw a shape around the area of interest on the orthomosaic, right click and choose update altitudes. Then goto mesh and you'll see the shape in 3D, if you are on dense cloud you can also select points enclosed by shape, if that is your desire. If you want a more detailed shape projected onto the mesh all along the edges, and not just on the vertices, there's is a workaround as well.
Regards

José Martínez
info@accupixel.co.uk
Accupixel & Geobit
Metashape training