These lightweight, foldable GCPs are easy to transport and carry. If the wind is a concern, simply use the 4 corner eyelets to anchor the GCP to the ground to ensure that the GCP stays in place. For survey, simply place the survey marker through the 3″ x 3″ center cutout of the GCP to perform precise aerial mapping with pre-established coordinates. With an ideal 120cm by 120cm size, these GCPs are perfect for UAV mapping. Take your drone mapping to new heights today with this new set of GCP 5 Pack!