Extraction and accuracy assessment of high-resolution DEM and derived orthoimages from ALOS-PRISM data over Sahel-Doukkala (Morocco)

Habib, Adnane; Akdim, Nadia; Ghandour, Fatima-ezzahra El; Labbassi, Kamal; Khoshelham, Kourosh; Menenti, Massimo

doi:10.1007/s12145-017-0287-5

Cited by 17 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Concerning SBF, a combination of TSA75 and SR3 has been chosen. After finding the optimal parameters for each filter, they were applied individually and in combination to DEM extracted from ALOS PRISM data with a spatial resolution of 10 m [7].…”

Section: Resultsmentioning

confidence: 99%

“…The presence of such error results in very noisy DEM and injects uncertainty in the derived geomorphometric parameters. Several studies have indicated that derived geomorphometric parameters; such as average terrain slope, are positively correlated with the increase in the global error of the modeled surface [7], [8]. It is clear that such DEMs need editing and filtering in order to enhance their quality before they can be used for geomorphometric analysis [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing DEMs for geomorphometric research through digital filtering

Habib

Khoshelham

Akdim

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

1Abstract-Currently, Digital Elevation Models (DEMs) are the main source for representing Earth's surface and have been an integral part of any geospatial analysis, in particular, geomorphometric research. Among existing techniques, photogrammetry is considered as a common method for obtaining high-resolution elevation data, especially over large or/and inaccessible areas. However, this DEMs are disposed to a severe amount of uncertainty. The aim of this research is to provide an optimal filtering strategy that can remove possible errors and improve the quality of raw photogrammetric DEMs for geomorphometric research over regions with relatively low relief. Results reveal that a combination of three digital filters, namely Gaussian filter, Median filter, and Slope Based filter, is able to reduce different sources of errors and improve the elevation accuracy of DEM by more than 5%, resulting in improved quality of the derived geomorphometric parameters.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing DEMs for geomorphometric research through digital filtering

Habib

Khoshelham

Akdim

et al. 2018

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Printed archival materials usually offer drawings of isohypses or isobaths. For digital iterations, Digital Surface Models can be prepared using various measurement techniques [14]. The principal aim of this study is to create a dynamic Digital Elevation Model for the area of the Bełchatów Coal Mine.…”

Section: Methodsmentioning

confidence: 99%

“…According to the definition, it is a three-dimensional digital representation of the terrain surface, created from elevation data. To define the type of DEM more precisely, we can use two terms: Digital Surface Model (DSM), which is representing elevation of the Earth's surface, including all natural and anthropogenic land cover elements, while Digital Terrain Model (DTM) represents the elevation associated with the topography of the Earth based on natural features, excluding all man-made elements [14]. In DEM, a certain number of points, which represent real locations, are assigned three attributes defining their spatial location in the assumed co-ordinate system: longitude (usually marked as (x)), latitude (y), and elevation (z) [15].…”

Section: Methodsmentioning

confidence: 99%

Transformations of Landscape Topography of the Bełchatów Coal Mine (Central Poland) and the Surrounding Area Based on DEM Analysis

Jaskulski

Nowak

2019

IJGI

View full text Add to dashboard Cite

The authors analyze topography changes related to the construction and operation of the Bełchatów Brown Coal Open Mine and Power Plant, one of Europe’s larger open-pit mines, situated in central Poland. In order to achieve this, a DEM (Digital Elevation Model) is prepared, based on archival materials from the pre-investment period. Source materials include German topographical maps, issued in 1944 by the Supreme High Command of the German Army (Oberkommando des Heeres/Generalstab). The second model of the same area is prepared based on DEM data included in the Topographical Database available by CODGiK (Main Centre of Geodetic and Cartographic Documentation). The preparation of two terrain models from different periods make it possible to evaluate the changes in the morphometry. Both models are compared using ArcGIS (ESRI) tools. The comparative analysis of the models allows for observing topography changes resulting from anthropogenic transformations related to the construction of the Brown Coal Open Mine Bełchatów and Power Plant complex.

show abstract

“…The AVNIR-2 data were used to confirm the hummocky topography in and around the DAD. The PRISM optical sensor is a panchromatic radiometer for wavelengths of 0.52-0.77 µm, with a spatial resolution of 2.5 m. The original data were processed to generate a 3 m resolution DEM with a vertical accuracy of ∼ 6 m (Takaku and Tadono, 2007;Habib et al, 2017). This is resampled to 10 m resolution to avoid surficial noises.…”

Section: Reconstruction Of the Source Area Of Dad Using The Prism Demmentioning

confidence: 99%

Characteristics of debris avalanche deposits inferred from source volume estimate and hummock morphology around Mt. Erciyes, central Turkey

Hayakawa

Yoshida

Obanawa³

et al. 2018

Nat. Hazards Earth Syst. Sci.

View full text Add to dashboard Cite

Abstract. Debris avalanches caused by volcano sector collapse often form characteristic depositional landforms such as hummocks. Sedimentological and geomorphological analyses of debris avalanche deposits (DADs) are crucial to clarify the size, mechanisms, and emplacement of debris avalanches. We describe the morphology of hummocks on the northeastern flank of Mt. Erciyes in Kayseri, central Turkey, likely formed in the late Pleistocene. Using a remotely piloted aircraft system (RPAS) and the structurefrom-motion and multi-view stereo (SfM-MVS) photogrammetry, we obtained high-definition digital elevation model (DEM) and orthorectified images of the hummocks to investigate their geometric features. We estimated the source volume of the DAD by reconstructing the topography of the volcano edifice using a satellite-based DEM. We examined the topographic cross sections based on the slopes around the scar regarded as remnant topography. Spatial distribution of hummocks is anomalously concentrated at a certain distance from the source, unlike those that follow the distance-size relationship. The high-definition land surface data by RPAS and SfM revealed that many of the hummocks are aligned toward the flow direction of the debris avalanche, suggesting that the extensional regime of the debris avalanche was dominant. However, some displaced hummocks were also found, indicating that the compressional regime of the flow contributed to the formation of hummocks. These indicate that the flow and emplacement of the avalanche were constrained by the topography. The existing caldera wall forced the initial eastward flow to move northward, and the north-side caldera wall forced the flow into the narrow and steepened outlet valley where the sliding debris underwent a compressional regime, and out into the unconfined terrain where the debris was most likely emplaced on an extensional regime. Also, the estimated volume of 12-15 × 10 8 m 3 gives a mean thickness of 60-75 m, which is much deeper than the reported cases of other DADs. This suggests that the debris avalanche must have flowed further downstream and beyond the current DAD extent. Assessments of the DAD incorporating the topographic constraints can provide further insights into the risk and mitigation of potential disasters in the study area.

show abstract

Extraction and accuracy assessment of high-resolution DEM and derived orthoimages from ALOS-PRISM data over Sahel-Doukkala (Morocco)

Cited by 17 publications

References 33 publications

Enhancing DEMs for geomorphometric research through digital filtering

Enhancing DEMs for geomorphometric research through digital filtering

Transformations of Landscape Topography of the Bełchatów Coal Mine (Central Poland) and the Surrounding Area Based on DEM Analysis

Characteristics of debris avalanche deposits inferred from source volume estimate and hummock morphology around Mt. Erciyes, central Turkey

Contact Info

Product

Resources

About