topographical maps

Hello Guys, My name is Arnaud, basically I am a french IT engineer but 5 years ago I decided to make my own drone service company. So I moved to Indonesia and made my first company BaliDroneProduction specialized in Aerial Videography and photography service. I started with a simple phantom 3...

To the collective brains trust. I've been approached by a colleague (licensed surveyor) to put an expression of interest in to provide an aerial survey of a proposed walking trail. What is required is: 10 meter wide corridor survey along the 300km route. Accuracy is 50-100mm on the ground...