That is the lot they go to BEFORE they go to the transport lot to be loaded on trucks. There are many MYs there that have been covered for quite some time. The drone operators believe those are cars that need certain parts or minor repairs, versus others that are just passing thru on their way to a car transporter.
Just pop on down there and take emUnless we have access to the original photo with EXIF information there's no accurate way to determine size because anything nearer is larger and anything further away is smaller. Give me two photos, side views, of every Tesla vehicle taken with the same camera lens from the exact same distance and I'll be happy.