Accuracy Assessment of TanDEM-X 90 m Digital Elevation Model In East of Malaysia Using GNSS/Levelling

Halim, Siti Mariam Abdul; Green, Muhammad Faiz Pa'suya; Narashid, Rohayu Haron; Din, Ami Hassan Md

doi:10.1109/icsgrc.2019.8837059

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…Accordingly, phase information (interferogram) over vegetated areas, which have low coherence will not produce accurate elevation measures. For the denser vegetated coverage areas, it is better to use L-band satellite data to create a DEM rather than C and X-bands [ 67 , 103 ].…”

Section: Discussionmentioning

confidence: 99%

“…Available eight GCPs for Malaysia and six for Iran were used for validation. Normally, available GCPs are rare for example, Halim, et al [ 67 ] used 45 GCPs (in 198,000 km 2 meaning 1 GCP per 4400 km 2 ) for a study performed in East of Malaysia. And in another study done in Perlis region in Malaysia, Pa’suya, et al [ 68 ], used 38 GCPs (in 810 km 2 meaning 1 GCP per 21 km 2 ).…”

Section: Methodsmentioning

confidence: 99%

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A Multi-Sensor Comparative Analysis on the Suitability of Generated DEM from Sentinel-1 SAR Interferometry Using Statistical and Hydrological Models

Mohammadi

Karimzadeh

Jalal

et al. 2020

Sensors

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Digital elevation model (DEM) plays a vital role in hydrological modelling and environmental studies. Many essential layers can be extracted from this land surface information, including slope, aspect, rivers, and curvature. Therefore, DEM quality and accuracy will affect the extracted features and the whole process of modeling. Despite freely available DEMs from various sources, many researchers generate this information for their areas from various observations. Sentinal-1 synthetic aperture radar (SAR) images are among the best Earth observations for DEM generation thanks to their availabilities, high-resolution, and C-band sensitivity to surface structure. This paper presents a comparative study, from a hydrological point of view, on the quality and reliability of the DEMs generated from Sentinel-1 data and DEMs from other sources such as AIRSAR, ALOS-PALSAR, TanDEM-X, and SRTM. To this end, pair of Sentinel-1 data were acquired and processed using the SAR interferometry technique to produce a DEM for two different study areas of a part of the Cameron Highlands, Pahang, Malaysia, a part of Sanandaj, Iran. Based on the estimated linear regression and standard errors, generating DEM from Sentinel-1 did not yield promising results. The river streams for all DEMs were extracted using geospatial analysis tool in a geographic information system (GIS) environment. The results indicated that because of the higher spatial resolution (compared to SRTM and TanDEM-X), more stream orders were delineated from AIRSAR and Sentinel-1 DEMs. Due to the shorter perpendicular baseline, the phase decorrelation in the created DEM resulted in a lot of noise. At the same time, results from ground control points (GCPs) showed that the created DEM from Sentinel-1 is not promising. Therefore, other DEMs’ performance, such as 90-meters’ TanDEM-X and 30-meters’ SRTM, are better than Sentinel-1 DEM (with a better spatial resolution).

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

A Multi-Sensor Comparative Analysis on the Suitability of Generated DEM from Sentinel-1 SAR Interferometry Using Statistical and Hydrological Models

Mohammadi

Karimzadeh

Jalal

et al. 2020

Sensors

View full text Add to dashboard Cite

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“…ALOS and was accessible to the public. Currently, the ALOS is the most accurate DEM data source globally with a resolution of 1 arc-second which is around 30 m mesh version [18]. The AW3D30 is an enhanced version of the 5-m mesh version of the ALOS.…”

Section: Open-source Digital Elevation Modelmentioning

confidence: 99%

Accuracy assessment of open-source global digital elevation models (GDEMs) with global navigation satellite system (GNSS) levelling

Rahman

Din

Hamid

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Shuttle Radar Topography Mission (SRTM), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER ), Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010), Advanced Land Observing Satellite World-3D (ALOSW3D), and TerraSAR-X Digital Elevation Measurement (TanDEM-X) are open-source Digital Elevation Model (DEM) datasets for environmental modelling and studies. The spatial resolution and vertical accuracy of DEM data sources play a significant role, particularly in dealing with land inundation, periodic flooding, and coastal erosion. In this study, the comparison between orthometric height, H from Global Navigation Satellite System (GNSS) observation, and DEM is performed to evaluate the accuracy of each DEM in terms of their Root Mean Square Error (RMSE) and correlation coefficient, R2 for monitoring the coastline. The result has indicated that TanDEM-X shows the smallest RMSE of 2.574 m compared to SRTM30, SRTM90, ASTER, GMTED10, and ALOSW3D with RMSE of 2.968 m, 3.006 m, 3.217 m, 2.975 m, and 2.876 m respectively. Furthermore, TanDEM-X illustrates the largest correlation coefficients, R2 of 0.959 m, compared to SRTM30, SRTM90, ASTER, GMTED10, and ALOSW3D at 0.891 m, 0.899 m, 0.590 m, 0.888 m 0.913 m respectively. Hence, the result has indicated that TanDEM-X is the best option among all DEMs for any topographic applications.

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“…Since 2011, the official Italian Geodetic System consists of the ETRF2000 implementation of the ETRS89 Global System; it allows the direct use of GNSS techniques (Crainic, n.d.;Devoti et al, 2014;Halim et al, 2019;Tarig, 2012), which, if properly applied, allow for reach high precision observations without the need for the points to be intervisible (Figure 2).…”

Section: Planimetric Reference Systemmentioning

confidence: 99%

GNNS Control Network Supporting Large Historical Building Architectural Survey

Bonora

Maseroli

Mugnai

et al. 2021

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

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Abstract. The paper points the attention to some hidden parts of metric surveys, that usually are not enough documented in scientific papers but in technical reposts. Reporting encountered challenges and discussing identified technical solutions and methodologies to overcome bottlenecks and operative issues, highlights the novelty of the presented experience from a technical viewpoint. The overall approach has been reported taking care of describing technical details and present case study’s implementation of the applied techniques. Integrating GNSS control Networks and topographic tools to design, implement and perform a rigorous topographic survey methodology in describing built heritage, which is one of the modern geomatics’ advancements, has been depicted. An ad hoc datum has been designed to guarantee a clear compliance both to cartographic standards and architectural representations in 1:50 to 1:100 graphical output scale.

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Accuracy Assessment of TanDEM-X 90 m Digital Elevation Model In East of Malaysia Using GNSS/Levelling

Cited by 7 publications

References 20 publications

A Multi-Sensor Comparative Analysis on the Suitability of Generated DEM from Sentinel-1 SAR Interferometry Using Statistical and Hydrological Models

A Multi-Sensor Comparative Analysis on the Suitability of Generated DEM from Sentinel-1 SAR Interferometry Using Statistical and Hydrological Models

Accuracy assessment of open-source global digital elevation models (GDEMs) with global navigation satellite system (GNSS) levelling

GNNS Control Network Supporting Large Historical Building Architectural Survey

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