Accuracy analysis, DEM generation and validation using Russian TK-350 stereo-images

Buyuksalih G., Kocak G., Oruc M., Akcin H., Jacobsen K.

PHOTOGRAMMETRIC RECORD, cilt.19, sa.107, ss.200-218, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 19 Sayı: 107
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1111/j.0031-868x.2004.00279.x
  • Dergi Adı: PHOTOGRAMMETRIC RECORD
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.200-218
  • Anahtar Kelimeler: DEM generation and validation, geometric accuracy, image matching, Russian TK-350 images
  • İstanbul Üniversitesi Adresli: Hayır

Özet

TK-350 stereo-scenes of the Zonguldak testfield in the north-west Of Turkey have been analysed. The imagery had a base-to-height ratio of 0-52 and covered an area of 200 km x 300 km, with each pixel representing 10 m on the ground. Control points digitised from 1:25 000 scale topographic maps were used in the test. A bundle orientation was executed using the University of Hanover program BLUH and PCI Geomatica OrthoEngine AE software packages. Tests revealed that TK-350 stereo-images can yield 3D geopositioning to an accuracy of about 10m in planimetry and 17m in height. A 40 m resolution digital elevation model (DEM) was generated by the PCI system and compared against a reference DEM, which was derived from digitised contour lines provided by 1:25 000 scale topographic maps. This comparison showed that accuracy depends mainly on the surface structure and the slope of the local terrain. Root mean square errors in height were found to be about 27 and 39 m, outside and inside forested areas, respectively. The matched DEM demonstrated a systematic shift against the reference DEM visible as an asymmetric shift in the frequency distribution. This is perhaps caused by the presence of vegetation and buildings.