Obtaining High Fidelity Triangular Regular Network from Only DEM Points

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Gökgöz T.

CARTOGRAPHIC JOURNAL, cilt.47, ss.150-156, 2010 (SSCI) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 47
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1179/000870409x12584524219009
  • Dergi Adı: CARTOGRAPHIC JOURNAL
  • Derginin Tarandığı İndeksler: Social Sciences Citation Index (SSCI), Scopus
  • Sayfa Sayıları: ss.150-156
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

When the source data for the digital elevation model (DEM) are not known and any additional information or features such as skeleton lines of terrain is not available, a triangular regular network (TRN) is constructed with simple subdivision using one or two diagonals uniformly. Such a model gives inaccurate directions for interpolation because of the inaccurate diagonals used in triangulation and thereby, results in inaccurate contours representing artificial terrain features. In this study, a new method is developed based on slope information computed at DEM points determining accurate diagonals in the subdivision process, which is beneficial not only through the skeleton lines of a terrain but also all over the DEM. Consequently, it is shown that the proposed method is able to build a high fidelity TRN from a DEM without any additional information or features.