lining up GCPs with Multispectral orthomosaics

[_danny_]

I use a phantom 4 multispectral UAV to produce orthomosaics in Metashape 1.6.4. The particular surveys I am interested were flown at 20m height with 80% front and side overlap. When importing GCPs manually, I've noticed that switching the primary channel from default to any other band causes markers to turn from green to white, and often the predicted center point moves up to 20cm from the middle of the marker that I've manually set in the default primary channel.

Does this mean that if manually importing GCPs it is necessary to place them for each individual band?  Unfortunately I haven't been able to get the auto detect option to work well with my GCPs, I think because they are not dark enough..

[Belca]

Hi,

I am facing the same problem using phantom 4 multispectral UAV version 1.7.1, any advance?
if I place GCPs only on the primary channel band, I obtain an orthophoto with non-aligned bands.