Propagation of DEM Varying Accuracy into Terrain-Based Analysis.

Farjas Abadía, Mercedes and Morillo Moya, María Del Carmen and Katerji, Wassim (2015). Propagation of DEM Varying Accuracy into Terrain-Based Analysis.. In: "ICGIS 2015: International Conference on Geographic Information.", 26 y 27 de marzo de 2015, Madrid (España).. ISBN 1307-6892. pp. 1546-1549.

Description

Title: Propagation of DEM Varying Accuracy into Terrain-Based Analysis.
Author/s:
  • Farjas Abadía, Mercedes
  • Morillo Moya, María Del Carmen
  • Katerji, Wassim
Item Type: Presentation at Congress or Conference (Article)
Event Title: ICGIS 2015: International Conference on Geographic Information.
Event Dates: 26 y 27 de marzo de 2015
Event Location: Madrid (España).
Title of Book: International Science Index, Geological and Environmental Engineering. Proceedings of the 17th International Conference on Geographic Information Systems
Date: 2015
ISBN: 1307-6892
Volume: 2 (3)
Subjects:
Freetext Keywords: Terrain-based analysis, slope, accuracy assessment, Digital Elevation Model (DEM)
Faculty: E.T.S.I. en Topografía, Geodesia y Cartografía (UPM)
Department: Ingeniería Cartográfica y Topografía
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Análisis de precisión en modelos digitales de elevación globales. ABSTRACT: Terrain-Based Analysis results in derived products from an input DEM and these products are needed to perform various analyses. To efficiently use these products in decision-making, their accuracies must be estimated systematically. This paper proposes a procedure to assess the accuracy of these derived products, by calculating the accuracy of the slope dataset and its significance, taking as an input the accuracy of the DEM. Based on the output of previously published research on modeling the relative accuracy of a DEM, specifically ASTER and SRTM DEMs with Lebanon coverage as the area of study, analysis have showed that ASTER has a low significance in the majority of the area where only 2% of the modeled terrain has 50% or more significance. On the other hand, SRTM showed a better significance, where 37% of the modeled terrain has 50% or more significance. Statistical analysis deduced that the accuracy of the slope dataset, calculated on a cell-by-cell basis, is highly correlated to the accuracy of the input DEM. However, this correlation becomes lower between the slope accuracy and the slope significance, whereas it becomes much higher between the modeled slope and the slope significance.

More information

Item ID: 36286
DC Identifier: http://oa.upm.es/36286/
OAI Identifier: oai:oa.upm.es:36286
Official URL: https://www.waset.org/conference/2015/03/madrid/ICGIS
Deposited by: Memoria Investigacion
Deposited on: 25 Jan 2016 12:33
Last Modified: 25 Jan 2016 12:33
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