Many thanks Ecodrones.
Thank you Marc.
Here is the complete post:
Hi, watched the video - looks like a great project. Well done.
How many altitudes did you use to get the same GSD?
Many thanks Antonie
Only two different altitudes.
It were one of the many difficulties but the more complicated was to comply with the position of the sun to photograph the different faces of the cliff and avoid shadows.
Here is our FB page if you want join us:
I'm going to join now. Thanks for your answer.