In this course advance technologies in the field of land survey are introduced, ancient times land survey was conducted with chains/ measuring tapes and Compass etc. It requires more time and manpower, but the accuracy level of survey was not achieved and also less details of area were obtained. As in advancement in the time, survey get more advance now UAVs and GNSS Technology is used for this purpose. For a large area, in few hours with less manpower we will get more accurate result.