&lt;b&gt;Principle and geomorphological applicability of summit level and base level technique using Aster Gdem satellite-derived data and the original software Baz

Motoki, Akihisa; Motoki, Kenji Freire; Sichel, Susanna Eleonora; Silva, Samuel da; Aires, José Ribeiro

doi:10.4025/actascitechnol.v37i2.20317

Cited by 3 publications

(1 citation statement)

References 9 publications

(15 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Digital elevation models (DEMs) are often used as important data in a wide range of geographical and environmental research [1][2][3][4][5][6] and can be acquired by various methods including spatial interpolation based on ground control points (GCPs) [7,8], airborne or spaceborne LiDAR [9,10] and terrestrial laser scanning [11,12]. Due to topographic, political, climatic, financial and/or technical obstacles [13,14], such methods are however not suitable for producing DEMs of large areas-for example Chinese cities or counties-that cover areas of thousands of square kilometers.…”

Section: Introductionmentioning

confidence: 99%

Improving ASTER GDEM Accuracy Using Land Use-Based Linear Regression Methods: A Case Study of Lianyungang, East China

Yang

Chen

et al. 2018

IJGI

View full text Add to dashboard Cite

The Advanced Spaceborne Thermal-Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM) is important to a wide range of geographical and environmental studies. Its accuracy, to some extent associated with land-use types reflecting topography, vegetation coverage, and human activities, impacts the results and conclusions of these studies. In order to improve the accuracy of ASTER GDEM prior to its application, we investigated ASTER GDEM errors based on individual land-use types and proposed two linear regression calibration methods, one considering only land use-specific errors and the other considering the impact of both land-use and topography. Our calibration methods were tested on the coastal prefectural city of Lianyungang in eastern China. Results indicate that (1) ASTER GDEM is highly accurate for rice, wheat, grass and mining lands but less accurate for scenic, garden, wood and bare lands; (2) despite improvements in ASTER GDEM2 accuracy, multiple linear regression calibration requires more data (topography) and a relatively complex calibration process; (3) simple linear regression calibration proves a practicable and simplified means to systematically investigate and improve the impact of land-use on ASTER GDEM accuracy. Our method is applicable to areas with detailed land-use data based on highly accurate field-based point-elevation measurements.

show abstract

Section: Introductionmentioning

confidence: 99%

Improving ASTER GDEM Accuracy Using Land Use-Based Linear Regression Methods: A Case Study of Lianyungang, East China

Yang

Chen

et al. 2018

IJGI

View full text Add to dashboard Cite

show abstract

Lineament depth deduction using geomorphometry and 3D Euler solution

El Koundi,

Dhaoui,

El Ghali

2024

Acta Geophys.

View full text Add to dashboard Cite

In this paper, we present a novel method for determining the depth of lineaments using satellite gravity data, which we test in the Sahel of Sfax area (eastern Tunisia). This region has a relatively flat topography with few significant discontinuities at the surface.As a first step, we used morphometric indices such as slope, aspect, and hydrographic network, calculated from SRTM-DEM, to generate separate lineament maps. We then combined these lineaments into a synthetic lineament map, which showed a high level of agreement with the Bouguer anomaly map derived from satellite gravity data and with previous studies that used geophysical data (seismic and gravity). We also validated the lineament map using field data.By fusing these lineaments with the 3D Euler solution map, we were able to deduce the depth classification of the lineaments. Our results demonstrate the effectiveness of our proposed method in estimating the depth of lineaments and its potential to provide valuable insights into the subsurface geology of an area. This method can be a useful tool for mineral exploration, hydrocarbon exploration, and geohazard assessments.

show abstract

Quantifying Morphostructural Evolution of the Eastern Algerian Saharan Atlas (NE, Algeria) Using GIS-based Surface Envelope Technique, Drainage Network Analysis, and Geological Features

Boufaa,

Bougherara,

Bouaicha

et al. 2024

Earth sci. res. j.

View full text Add to dashboard Cite

This research work focuses on the morphostructural evolution of the eastern end of the Algerian Saharan atlas. The study employs a comprehensive methodology involving the utilization of the surface envelope technique, combined with an analysis of the hydrographic network and geological context. These techniques are integrated within a GIS framework to decipher the current relief characteristics. To interpret the current relief features, two ASTGTM v2 tiles were processed to extract morphometric data. The reconstruction of the original relief requires the generation of the summit level surface, the base level surface and the relief amount maps for 3 different grid sizes (4000m, 1000m and 250m). The respective different grid size maps has allowed determining the initial surface of the reliefs; first before any major vertical erosion, then after a phase of dismantling and finally the recent and sub current morphological aspect. The extraction of the hydrographic network and the elimination of lower than order 5 streams revealed the harmony of the latter with a raised shaped form (mega-horst) which represents the main morphostructural unit. This morphostructure is particularly characterized by outcrops from the Lower Cretaceous outcrops. The ramification of the hydrographic network along the main tectonic accidents has allowed the digging of wide valleys, often described as graben.

show abstract

<b>Principle and geomorphological applicability of summit level and base level technique using Aster Gdem satellite-derived data and the original software Baz

Cited by 3 publications

References 9 publications

Improving ASTER GDEM Accuracy Using Land Use-Based Linear Regression Methods: A Case Study of Lianyungang, East China

Improving ASTER GDEM Accuracy Using Land Use-Based Linear Regression Methods: A Case Study of Lianyungang, East China

Lineament depth deduction using geomorphometry and 3D Euler solution

Quantifying Morphostructural Evolution of the Eastern Algerian Saharan Atlas (NE, Algeria) Using GIS-based Surface Envelope Technique, Drainage Network Analysis, and Geological Features

Contact Info

Product

Resources

About