A Development in Semi Automatisation of UAV Terrestrial Direct Georeference

Unmanned Aerial Vehicle (UAV) can be used together with a Robotic Total Station in Terrestrial Direct Georeference system. More sophisticate terrestrial survey equipment can identify UAV postion automatically, this ability eliminate the problem of moving target focusing and be able to acquire target coordinate continously and make UAV system become reliable as an alternative solution to map some cluster of parcels in rural or village area which has less and difficult transportation facility and as the solution to provide spatial data for land administration purpose too. Inspite of UAV technology characterize with low altitude flight, adaptive with the environment, climate condition problem overcoming like cloud cover, there is some question in geometric accuracy of aerial photo map produced from UAV system. UAV geometric accuracy problem caused by several factor likes; platform flight instability, flying height variation as wind influences causing various photo scale. To solve the problem, modification of existing method carried out by introducing accurate control points into aerial photo image. The modification offered in this research is the combination between UAV and Robotic Total Station. Robotic total sation follows every UAV movement and acquired its position in the same time, these coordinte information applying as the coordinate of photo central. Aerial photo will have an accurate central photo both horizontal (x,y) and vertical (z). The error effect reduced significantly using these measured coordinate photo from a robotic total station on the ground and yield accurate map