| Title |
Stability Analysis of DMC"s Block Geometry |
| Keywords |
aerial photogrammetry;DMC;Aerial triangulation;cross strip;GCP;EO;항공사진측량;항공삼각측량;횡스트립;지상기준점;외부표정요소 |
| Abstract |
Digital topographical maps used for GIS DB are mainly produced by the traditional way of analogue aerial photogrammetry. Therefore, analogue photos are only available for digital mapping after preprocessing such as film developing, printing and scanning. However, digital aerial camera is able to get digital image directly without preprocessing and thus the performance and efficiency of photogrammetry are extremely increased. This study aims to investigate geometric stability of digital aerial frame camera DMC (Digital Modular Camera). In order to verify the geometric stability of digital aerial camera DMC, some different block conditions with and without cross strips, GPS/INS data and variation of GCPs are introduced in the block adjustment. The accuracy results of every block condition were compared each other by computation of residuals of exterior orientation (EO) parameters. Results of study shows that the geometric stability of the block adjustment with cross strips is increased about 30% against without cross strips. The accuracy of EO parameters of block adjustment with cross strips is also increased about 2㎝ for X-coordinate, 3㎝ for Y-coordinate, 3㎝ for Z-coordinate, and 6" for omega, 4" for phi and 3" for kappa. |