Comparison of the accuracies of different interpolation methods for orthometric height estimation


Akar A.

The 8th International Academic Studies Conference, İstanbul, Turkey, 15 - 17 March 2022, pp.110-115

  • Publication Type: Conference Paper / Full Text
  • City: İstanbul
  • Country: Turkey
  • Page Numbers: pp.110-115
  • Erzincan Binali Yildirim University Affiliated: Yes

Abstract

The ellipsoid and geoid are the two datum surfaces used in geodetic applications. These datum surfaces reveal the ellipsoidal height by referencing the ellipsoid and the orthometric height by referencing the geoid. Today, height information, as well as horizontal position information, can be obtained by using the Global Navigation Satellite System (GNSS). However, the heights produced by

GNSS are ellipsoidal heights. For this reason, ellipsoidal heights obtained with GNSS receivers must be converted to orthometric heights. This study aims to compare the accuracies of digital elevation models (DEMs) created with different interpolation techniques using tachymetric measurements made by the trigonometric leveling method. Kriging, Minimum Curvature (MC), Natural Neighbor (NaN), Triangulation with Linear Interpolation (TLI), Multilog (ML), and Multiquadric (MQ) methods were used in the study. As a result of the evaluation, it has been seen that Kriging is the highest accuracy DEM-producing interpolation method using trigonometric leveling measures.