A dense geometry reconstruction based on multi-view stereopsis resulted in a more detailed 3D model with 10 million facets. This model was used to identify the 12 large GCPs to improvet he absolute accuracy of the bundle adjustment and the 3D model.After the recomputed bundle adjustment a new 3D model with 50 million facets was generated with the PhotoScan accuracy for the geometry build set to high. Finally, a DSM was generated by gridding the 3D model based on a given cartographic projection(WGS84 UTM 49S) and cell size (2 cm). Projecting the original photographs onto the 3D surface and blending their overlap zones produced an orthophoto mosaic (orthomosaic) of the whole area.