The technology used in UAVs (unmanned aerial vehicles) by Vaayu is outdated and based on old concepts. They are unreliable and prone to errors. There are no varieties of drones in their company and they rely on few models. Whether you are looking for land mapping or topography surveys their results look very inconsistent. Their teams are unprofessional and lack credibility. They had no idea about their work and the entire process took more time than it should have. We would have been better off with manual surveyors. Very disappointed with the experience.