Marker at base of image

[kvandersys]

I have an aerial in which the GCP is at the base of the building and blocked by an overhang. Should the marker (GCP 1d-5) on that image be blocked so that the elevation isn't misinterpreted when I calibrate the model?

[Alexey Pasumansky]

Hello kvandersys,

The markers' projections which are defined on the images with the gray flag are not utilized for the processing. Such flags are only suggesting the location of the projection to the user according to the other projections (blue and green flags). So in this case (like shown on the screenshot) you do not have to "block marker", just leave it as is.

[mli]

Hello kvandersys,

The markers' projections which are defined on the images with the gray flag are not utilized for the processing. Such flags are only suggesting the location of the projection to the user according to the other projections (blue and green flags). So in this case (like shown on the screenshot) you do not have to "block marker", just leave it as is.

Hello Alexey,
I have some markers that are marked with blue flags in the photos。The scene is a Mais field， some markers could be The fact is， they are slight occluded. which means I know the GCPs locate within several pixels however I could not be precise about the exact position。 What should I do with these flags---- to guess a positon or block marker or clear marker？
Does ‘clear marker’ means there is no marker？Can you explain more about difference and later algorithm impact between ‘clear marker’ and ‘block marker’

Minhui