Geometric Analysis of Digital Aerial Images

The data produced by photogrammetric methods have become used more effectively and efficiently to take place of digital aerial cameras to aerial film cameras. Digital aerial cameras have distinct properties according to imaging geometry, sensor numbers, the placement of camera cones and image recording techniques. Since 2000, many studies have been done upon the geometric analysis of the rapidly developing digital imaging system. Intergraph DMC and Vexcel Ultracam are among the most popular digital imaging systems in this area. These cameras are large-format digital aerial camera systems. The purpose of the present study was to investigate the geometric performance of DMCII-250e and Vexcel UltraCamX large-format digital aerial camera systems. The test flights were performed in Bursa province. Two different image blocks which are 10 cm GSD and 30 cm GSD were acquired at different flight altitudes. The image measurements for aerial triangulation were performed by Mescioglu Engineering Inc. The images were processed with Match-AT software. It has been compared the residuals of coordinates and RMS of ground control points and check points triangulated image blocks.