 This paper presents a method for accurately rectifying mosaic-ing unmanned aerial vehicle, UAV, photographs. Firstly, the UAV images are converted into a three-dimensional point cloud which is then transformed into a real-world coordinate system. This is done by either directly jorferencing the camera position or by using ground control points, GCPs. Once the point cloud is geo-referenced, the individual images can be joined together to form a mosaic of the study area. The accuracy of the two methods was tested and found to be between 65 cm and 120 cm for the direct method and 10-15 cm for the GCP method. This article was authored by Christopher Watson, Arco Lucia, and Darren Turner.