So I wonder how the real estate agencies legally obtain some of their overhead photos?
Quite legally, if:
- within CTA, they remain below 400FT AGL, and
- if within CTA and within 3NM of a controlled AD at any level, they obtain permission from the AD controlling authority, and
- they comply with the other basic requirements (keep 30m clear of other people, helipads etc. etc.).
More specific info here:
Unmanned Aerial Systems in controlled airspace | Airservices