I am an old dog. I know nothing about drones, but have heard recently that It is possible to map elevation accurately and then use these map values in conjunction with my RTK system to create surface drain structures.
I guess my question is : what is the true state of the tech by now ? Is anyone doing this professionally? I am quite sure my questions seem pretty rudimentary, but in the 38 years I have been in this business I have had to learn a lot.