Other data available for the purpose of this project were: terrain elevation data - DTED Level 2 (in NATO standard format) and digital orthophoto from midle scale photography, which was used for mono plotting of building basements and consequently served as the reference data.
Process of exterior orientation of two Ikonos images and their stereo compilation were carried out on the photogrammetric system Summit Evolution combined with ArcGIS, which accepts the Ikonos imagery and their corresponding RPC coefficients. The wide range of the Summit Evolution projects (depending on various input data) is shown in the figure 4.