The word "survey" is not owned by Registered Professional Land Surveyors. It has a number of meanings, including "to observe". Anyone who feels they have the right to privacy when being observed in the open, from Federally mandated public space in the sky above is a bit naive these days. Drone mapping is no different than what Google Earth or any number of other U.S. and international satellites do every day, except that a drone flight is lower. Hypothetically, I bet if my aerial photograph was presented at the hearing as being a Google Earth image it would be perfectly acceptable as evidence -- because people have gotten used to Google Earth images. And for the record, my flight had nothing to do with surveying property lines, so there was no need to hire a Registered Professional Land Surveyor in this case. Whether the image will be allowed in the hearing is an argument for the lawyers.