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Journal articles on the topic 'Digital elevation model (DEM)'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Costa, Elias Mendes, Alessandro Samuel-Rosa, and Lúcia Helena Cunha dos Anjos. "Digital elevation model quality on digital soil mapping prediction accuracy." Ciência e Agrotecnologia 42, no. 6 (2018): 608–22. http://dx.doi.org/10.1590/1413-70542018426027418.

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ABSTRACT Digital elevation models (DEM) used in digital soil mapping (DSM) are commonly selected based on measures and indicators (quality criteria) that are thought to reflect how well a given DEM represents the terrain surface. The hypothesis is that the more accurate a DEM, the more accurate will be the DSM predictions. The objective of this study was to assess different criteria to identify the DEM that delivers the most accurate DSM predictions. A set of 10 criteria were used to evaluate the quality of nine DEMs constructed with different data sources, processing routines and three resolu

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Vulić, Ivan, Mirko Borisov, Radomir Prodanović, et al. "Protection of Digital Elevation Model—One Approach." Applied Sciences 12, no. 19 (2022): 9898. http://dx.doi.org/10.3390/app12199898.

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The quality of DEMs is especially being considered based on the spatial resolution of the created digital models and the type of terrain of the interest area. DEM analysis was performed specifically for LiDAR-based DEMs, as well as a comparison with results obtained using the radar recording method (Shuttle Radar Topography Mission). The application of DEM data for security-sensitive systems requires the fulfillment of security requirements, such as authenticity, integrity, confidentiality, and non-repudiation. For this purpose, the authors have developed a model for non-repudiation and protec

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Segoni, Samuele, and Sandro Moretti. "Influence of DEM (Digital Elevation Model) Resolution in Geomorphological Modeling." Paripex - Indian Journal Of Research 3, no. 3 (2012): 39–40. http://dx.doi.org/10.15373/22501991/mar2014/12.

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Kamiński, Mirosław. "The Impact of Quality of Digital Elevation Models on the Result of Landslide Susceptibility Modeling Using the Method of Weights of Evidence." Geosciences 10, no. 12 (2020): 488. http://dx.doi.org/10.3390/geosciences10120488.

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The paper discusses the impact that the quality of the digital elevation model (DEM) has on the final result of landslide susceptibility modeling (LSM). The landslide map was developed on the basis of the analysis of archival geological maps and the Light Detection and Ranging (LiDAR) digital elevation model. In addition, complementary field studies were conducted. In total, 92 landslides were inventoried and their degree of activity was assessed. An inventory of the landslides was prepared using a 1-m-LiDAR DEM and field research. Two digital photogrammetric elevation models with an elevation

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Arif Faisol, Samsul Bachri, and Mashudi. "KOMPARASI DATA DIGITAL ELEVATION MODEL (DEM) RESOLUSI MENENGAH DALAM MENGESTIMASI KETINGGIAN LAHAN DI KABUPATEN MANOKWARI PROVINSI PAPUA BARAT." Majalah Ilmiah Globe 26, no. 1 (2024): 11–20. http://dx.doi.org/10.24895/gl.2024.26.1.11-20.

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Saat ini telah tersedia data Digital Elevation Model (DEM) dalam berbagai resolusi, yaitu resolusi rendah hingga resolusi tinggi. Pada umumnya data DEM tersebut memiliki akurasi yang baik dalam mengestimasi ketinggian suatu lahan. Penelitian ini bertujuan untuk membandingkan 4 (empat) DEM resolusi menengah dalam mengestimasi ketinggian lahan di Kabupaten Manokwari Provinsi Papua Barat yaitu; Space Shuttle Radar Topography Mission (SRTM), ASTER Global DEM, Jaxa’s Global ALOS 3D World, dan Copernicus Digital Elevation Model. Secara umum penelitian ini terdiri atas 3 (tiga) tahapan utama yaitu in

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Franks, Shannon, James Storey, and Rajagopalan Rengarajan. "The New Landsat Collection-2 Digital Elevation Model." Remote Sensing 12, no. 23 (2020): 3909. http://dx.doi.org/10.3390/rs12233909.

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The Landsat Collection-2 distribution introduces a new global Digital Elevation Model (DEM) for scene orthorectification. The new global DEM is a composite of the latest and most accurate freely available DEM sources and will include reprocessed Shuttle Radar Topographic Mission (SRTM) data (called NASADEM), high-resolution stereo optical data (ArcticDEM), a new National Elevation Dataset (NED) and various publicly available national datasets including the Canadian Digital Elevation Model (CDEM) and DEMs for Sweden, Norway and Finland (SNF). The new DEM will be available world-wide with few ex

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Susetyo, D. B., Y. A. Lumban-Gaol, and I. Sofian. "PROTOTYPE OF NATIONAL DIGITAL ELEVATION MODEL IN INDONESIA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4 (September 19, 2018): 609–13. http://dx.doi.org/10.5194/isprs-archives-xlii-4-609-2018.

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<p><strong>Abstract.</strong> Although medium scale mapping has been done for the entire territory of Indonesia, there has never been a DEM unification to produce seamless national DEM. The main problem to generate national DEM is multi-data-sources. Each of them has their own specification, so unification of data becomes not easy to do. This research aims to generate global DEM database in Indonesia. Because its coverage covers only one country, it is called National DEM. This study will be focused on the northern part of Sumatra island, precisely in the boundaries between A

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Štular, Benjamin, Edisa Lozić, and Stefan Eichert. "Airborne LiDAR-Derived Digital Elevation Model for Archaeology." Remote Sensing 13, no. 9 (2021): 1855. http://dx.doi.org/10.3390/rs13091855.

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The use of topographic airborne LiDAR data has become an essential part of archaeological prospection, and the need for an archaeology-specific data processing workflow is well known. It is therefore surprising that little attention has been paid to the key element of processing: an archaeology-specific DEM. Accordingly, the aim of this paper is to describe an archaeology-specific DEM in detail, provide a tool for its automatic precision assessment, and determine the appropriate grid resolution. We define an archaeology-specific DEM as a subtype of DEM, which is interpolated from ground points

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Guth, Peter L., Adriaan Van Niekerk, Carlos H. Grohmann, et al. "Digital Elevation Models: Terminology and Definitions." Remote Sensing 13, no. 18 (2021): 3581. http://dx.doi.org/10.3390/rs13183581.

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Digital elevation models (DEMs) provide fundamental depictions of the three-dimensional shape of the Earth’s surface and are useful to a wide range of disciplines. Ideally, DEMs record the interface between the atmosphere and the lithosphere using a discrete two-dimensional grid, with complexities introduced by the intervening hydrosphere, cryosphere, biosphere, and anthroposphere. The treatment of DEM surfaces, affected by these intervening spheres, depends on their intended use, and the characteristics of the sensors that were used to create them. DEM is a general term, and more specific ter

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Chukwu, Onyekachi, Akintunde A. Alo, and Jacinta U. Ezenwenyi. "Development of digital elevation model for Okomu National Park, Nigeria." Current Life Sciences 4, no. 2 (2018): 27–32. https://doi.org/10.5281/zenodo.1241195.

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The type of soil, fauna and flora species that are found in an environment is affected by the elevation characteristics of the land. However, the ability to provide techniques and model that will effectively explain the elevation patterns of protected areas will aid sustainable management of the forest and its resources. This study developed Digital Elevation Model (DEM) for Okomu National Park, Nigeria. Point coordinates (2,272) with their respective elevations were randomly obtained covering the entire study area. Interpolated natural neighbour algorithm of the Quantum Geographic Information

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Malik, K., and D. Kumar. "HIGH RESOLUTION INTERFEROMETRIC DIGITAL ELEVATION MODEL GENERATION AND VALIDATION." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-5 (November 19, 2018): 755–56. http://dx.doi.org/10.5194/isprs-archives-xlii-5-755-2018.

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<p><strong>Abstract.</strong> In this paper high-resolution DEM generation has been attempted using the Cosmo-skymed data over the New Delhi, India area. The study area is an urban area filled with lots of building and settlement which was helpful to get the stable point in the time series images data. This DEM generation is based on the highly stable permanents scatter candidate (PSC). This PSC was selected on the basis of amplitude stability index which was generated/calculated using the 25 images of the cosmo-skymed acquired over the time. A sufficient number of field GPS

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Samsonov, Timofey E. "Automated Conflation of Digital Elevation Model with Reference Hydrographic Lines." ISPRS International Journal of Geo-Information 9, no. 5 (2020): 334. http://dx.doi.org/10.3390/ijgi9050334.

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Combining misaligned spatial data from different sources complicates spatial analysis and creation of maps. Conflation is a process that solves the misalignment problem through spatial adjustment or attribute transfer between similar features in two datasets. Even though a combination of digital elevation model (DEM) and vector hydrographic lines is a common practice in spatial analysis and mapping, no method for automated conflation between these spatial data types has been developed so far. The problem of DEM and hydrography misalignment arises not only in map compilation, but also during th

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Wessel, B., A. Bertram, A. Gruber, S. Bemm, and S. Dech. "A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-7 (June 7, 2016): 9–16. http://dx.doi.org/10.5194/isprsannals-iii-7-9-2016.

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In this paper we present for the first time the new digital elevation model (DEM) for Greenland produced by the TanDEM-X (TerraSAR add-on for digital elevation measurement) mission. The new, full coverage DEM of Greenland has a resolution of 0.4 arc seconds corresponding to 12 m. It is composed of more than 7.000 interferometric synthetic aperture radar (InSAR) DEM scenes. X-Band SAR penetrates the snow and ice pack by several meters depending on the structures within the snow, the acquisition parameters, and the dielectricity constant of the medium. Hence, the resulting SAR measurements do no

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Wessel, B., A. Bertram, A. Gruber, S. Bemm, and S. Dech. "A NEW HIGH-RESOLUTION ELEVATION MODEL OF GREENLAND DERIVED FROM TANDEM-X." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences III-7 (June 7, 2016): 9–16. http://dx.doi.org/10.5194/isprs-annals-iii-7-9-2016.

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In this paper we present for the first time the new digital elevation model (DEM) for Greenland produced by the TanDEM-X (TerraSAR add-on for digital elevation measurement) mission. The new, full coverage DEM of Greenland has a resolution of 0.4 arc seconds corresponding to 12 m. It is composed of more than 7.000 interferometric synthetic aperture radar (InSAR) DEM scenes. X-Band SAR penetrates the snow and ice pack by several meters depending on the structures within the snow, the acquisition parameters, and the dielectricity constant of the medium. Hence, the resulting SAR measurements do no

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Farah, Ashraf, Ashraf Talaat, and Farrag Farrag. "Accuracy Assessment of Digital Elevation Models Using GPS." Artificial Satellites 43, no. 4 (2008): 151–61. http://dx.doi.org/10.2478/v10018-009-0014-7.

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Accuracy Assessment of Digital Elevation Models Using GPSA Digital Elevation Model (DEM) is a digital representation of ground surface topography or terrain with different accuracies for different application fields. DEM have been applied to a wide range of civil engineering and military planning tasks. DEM is obtained using a number of techniques such as photogrammetry, digitizing, laser scanning, radar interferometry, classical survey and GPS techniques. This paper presents an assessment study of DEM using GPS (Stop&Go) and kinematic techniques comparing with classical survey. The result

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Laipelt, Leonardo, Bruno Comini de Andrade, Walter Collischonn, Alexandre de Amorim de Amorim Teixeira, Rodrigo Cauduro Dias de Paiva, and Anderson Ruhoff. "ANADEM: A Digital Terrain Model for South America." Remote Sensing 16, no. 13 (2024): 2321. http://dx.doi.org/10.3390/rs16132321.

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Digital elevation models (DEMs) have a wide range of applications and play a crucial role in many studies. Numerous public DEMs, frequently acquired using radar and optical satellite imagery, are currently available; however, DEM datasets tend to exhibit elevation values influenced by vegetation height and coverage, compromising the accuracy of models in representing terrain elevation. In this study, we developed a digital terrain model for South America using a novel methodology to remove vegetation bias in the Copernicus DEM GLO-30 (COPDEM) model using machine learning, Global Ecosystem Dyna

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Klikunova, A., and A. Khoperskov. "Creation of digital elevation models for river floodplains." Information Technology and Nanotechnology, no. 2391 (2019): 275–84. http://dx.doi.org/10.18287/1613-0073-2019-2391-275-284.

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A procedure for constructing a digital elevation model (DEM) of the northern part of the Volga-Akhtuba interfluve is described. The basis of our DEM is the elevation matrix of Shuttle Radar Topography Mission (SRTM) for which we carried out the refinement and updating of spatial data using satellite imagery, GPS data, depth measurements of the River Volga and River Akhtuba stream beds. The most important source of high-altitude data for the Volga-Akhtuba floodplain (VAF) can be the results of observations of the coastlines dynamics of small reservoirs (lakes, eriks, small channels) arising in

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Hu, Zhi, Rong Gui, Jun Hu, et al. "InSAR Digital Elevation Model Void-Filling Method Based on Incorporating Elevation Outlier Detection." Remote Sensing 16, no. 8 (2024): 1452. http://dx.doi.org/10.3390/rs16081452.

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Accurate and complete digital elevation models (DEMs) play an important fundamental role in geospatial analysis, supporting various engineering applications, human activities, and scientific research. Interferometric synthetic aperture radar (InSAR) plays an increasingly important role in DEM generation. Nonetheless, owing to its inherent characteristics, gaps often appear in regions marked by significant topographical fluctuations, necessitating an extra void-filling process. Traditional void-filling methods have operated directly on preexisting data, succeeding in relatively flat terrain. Wh

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Duan, Xinqiao, Lin Li, Haihong Zhu, and Shen Ying. "A high-fidelity multiresolution digital elevation model for Earth systems." Geoscientific Model Development 10, no. 1 (2017): 239–53. http://dx.doi.org/10.5194/gmd-10-239-2017.

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Abstract. The impact of topography on Earth systems variability is well recognised. As numerical simulations evolved to incorporate broader scales and finer processes, accurately assimilating or transforming the topography to produce more exact land–atmosphere–ocean interactions, has proven to be quite challenging. Numerical schemes of Earth systems often use empirical parameterisation at sub-grid scale with downscaling to express topographic endogenous processes, or rely on insecure point interpolation to induce topographic forcing, which creates bias and input uncertainties. Digital elevatio

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Shen, Xiaoyi, Chang-Qing Ke, Yubin Fan, and Lhakpa Drolma. "A new digital elevation model (DEM) dataset of the entire Antarctic continent derived from ICESat-2." Earth System Science Data 14, no. 7 (2022): 3075–89. http://dx.doi.org/10.5194/essd-14-3075-2022.

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Abstract. Antarctic digital elevation models (DEMs) are essential for fieldwork, ice motion tracking and the numerical modelling of the ice sheet. In the past 30 years, several Antarctic DEMs derived from satellite data have been published. However, these DEMs either have coarse spatial resolution or aggregate observations spanning several years, which limit their further scientific applications. In this study, the new generation satellite laser altimeter Ice, Cloud, and Land Elevation Satellite-2 (ICESat-2) is used to generate a new Antarctic DEM for both the ice sheet and ice shelves. Approx

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Jain, M., R. Deo, V. Kumar, and Y. S. Rao. "Evaluation of Time Series TanDEM-X Digital Elevation Models." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (November 28, 2014): 437–41. http://dx.doi.org/10.5194/isprsarchives-xl-8-437-2014.

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Digital Elevation Model (DEM) is an important input for geo-spatial analysis. For various applications like flood management, ortho rectification of remote sensing images, navigation, architectural works, defence, etc., high resolution DEM is required. TanDEM-X mission was launched in 2010 to obtain high resolution global DEM with HTRI-3 standard. SAR interferometry (InSAR) technique is used for DEM generation from TanDEM-X SAR data. The accuracy of DEM depends on many parameters like height ambiguity, incidence angle, polarization, etc. In this study, time series TanDEM-X data spanning over 3

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Karlson, Martin, David Bastviken, and Heather Reese. "Error Characteristics of Pan-Arctic Digital Elevation Models and Elevation Derivatives in Northern Sweden." Remote Sensing 13, no. 22 (2021): 4653. http://dx.doi.org/10.3390/rs13224653.

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Many biochemical processes and dynamics are strongly controlled by terrain topography, making digital elevation models (DEM) a fundamental dataset for a range of applications. This study investigates the quality of four pan-Arctic DEMs (Arctic DEM, ASTER DEM, ALOS DEM and Copernicus DEM) within the Kalix River watershed in northern Sweden, with the aim of informing users about the quality when comparing these DEMs. The quality assessment focuses on both the vertical accuracy of the DEMs and their abilities to model two fundamental elevation derivatives, including topographic wetness index (TWI

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Polidori, Laurent, and Mhamad El Hage. "Digital Elevation Model Quality Assessment Methods: A Critical Review." Remote Sensing 12, no. 21 (2020): 3522. http://dx.doi.org/10.3390/rs12213522.

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Digital elevation models (DEMs) are widely used in geoscience. The quality of a DEM is a primary requirement for many applications and is affected during the different processing steps, from the collection of elevations to the interpolation implemented for resampling, and it is locally influenced by the landcover and the terrain slope. The quality must meet the user’s requirements, which only make sense if the nominal terrain and the relevant resolution have been explicitly specified. The aim of this article is to review the main quality assessment methods, which may be separated into two appr

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Guo, Wenbo, and Jun Zhao. "Study on a Compatible Model Combining Point Cloud Model and Digital Elevation Model." Journal of Physics: Conference Series 2224, no. 1 (2022): 012086. http://dx.doi.org/10.1088/1742-6596/2224/1/012086.

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Abstract DEM is an important data source to describe the surface morphology, but it is not a real 3D model, which can not meet the requirements of true 3D description under the ground. LIDAR point cloud data is a new true 3D data with high precision and high density. Based on the analysis of the differences between DEM and point cloud data in acquisition method, data structure and model construction, this paper proposes a 3D point set data model based on regular grid 2D data field, as well as the idea of regional modeling, and tests the feasibility of the data model through the upper and lower

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Varga, Matej, Marijan Grgić, Olga Bjelotomić Oršulić, and Tomislav Bašić. "Influence of digital elevation model resolution on gravimetric terrain correction over a study-area of Croatia." Geofizika 36, no. 1 (2019): 17–32. http://dx.doi.org/10.15233/gfz.2019.36.1.

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High-resolution digital elevation models (DEMs) have become available in the last decade. They are used in geodesy and geophysics as the main data for modeling of topographic mass effects included in gravimetric and gradiometric measurements. In modeling process, gravimeric terrain correction is the central quantity which accounts for the variations of topographic masses around measured stations. This study deals with one segment of terrain correction computation: the impact of the resolution of digital elevation models. Computations are performed on study area of Republic of Croatia. Newly cr

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Hussein, Zahraa Ezzulddin. "Accuracy Evaluation of Digital Elevation Model Created Using Handheld Global Positioning System Receivers." Journal of Engineering 22, no. 6 (2016): 137–48. http://dx.doi.org/10.31026/j.eng.2016.06.10.

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This study aims to assess the accuracy of digital elevation model (DEM) created with utilization of handheld Global Positioning System (GPS) and comparing with Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM), version 2. It is known that the quality of the DEM is affected by both of accuracy of elevation at each pixel (absolute accuracy) and accuracy of presented morphology (relative accuracy). The University of Baghdad, Al Jadriya campus was selected as a study area to create and analysis the resulting DEM. Additionally, Geographic Inf

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Aryan, M., and Abd Wahid Bin Rasib. "Terrain Mapping for the Southwestern Desert of Iraq Using Interferometry Method from Sentinel-1A Images." IOP Conference Series: Earth and Environmental Science 1064, no. 1 (2022): 012015. http://dx.doi.org/10.1088/1755-1315/1064/1/012015.

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Abstract Synthetic aperture radar Interferometry is a popular three-dimensional imaging technique for creating a Digital Elevation Model. Using traditional methods for creating DEMs and terrain mapping is one of the methods that require high cost and time-consuming, which has affected the creation and updating of terrain maps in Iraq, so this study aims to use the InSAR technology to generate DEM, which contributes to the creation of terrain maps. In this work, the synthetic aperture radar interferometry approach was used on the interference stack generated from a pair of Sentinel-1A images wi

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Quintero, Rolando, Giovanni Guzman, Miguel Torres, Rolando Menchaca-Mendez, Marco Moreno-Ibarra, and Felix Mata. "A Compression Algorithm for Managing Digital Elevation Models in Mobile Devices." JUCS - Journal of Universal Computer Science 20, no. (10) (2014): 1433–42. https://doi.org/10.3217/jucs-020-10-1433.

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Nowadays, there are many applications such as disaster mitigation, survey-ing or geology-support, and others where Digital Elevation Models (DEM) are useful in the field. DEM typically requires a huge amount of data, making the tasks of DEMtransmission over a wireless network or storing and displaying it in a mobile device very complex. These tasks are important challenges in computer science research. Up-to-date, the compression techniques are used to compress DEMs with a high compression coefficient, nevertheless, whether the user requires to access the file or to obtain certaininformation a

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Hudec, P. "Analysis of accuracy of digital elevation models created from captured data by digital photogrammetry method." Slovak Journal of Civil Engineering 19, no. 4 (2011): 28–36. http://dx.doi.org/10.2478/v10189-011-0021-0.

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Analysis of accuracy of digital elevation models created from captured data by digital photogrammetry methodA digital elevation model (DEM) is an important part of many geoinformatic applications. For the creation of DEM, spatial data collected by geodetic measurements in the field, photogrammetric processing of aerial survey photographs, laser scanning and secondary sources (analogue maps) are used. It is very important from a user's point of view to know the vertical accuracy of a DEM. The article describes the verification of the vertical accuracy of a DEM for the region of Medzibodrožie, w

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Tran, T. A., V. Raghavan, S. Masumoto, P. Vinayaraj, and G. Yonezawa. "A geomorphology based approach for digital elevation model fusion – case study in Danang City, Vietnam." Earth Surface Dynamics Discussions 2, no. 1 (2014): 255–96. http://dx.doi.org/10.5194/esurfd-2-255-2014.

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Abstract. Global Digital Elevation Model (DEM) is considered as vital spatial information and finds wide use in several applications. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global DEM (GDEM) and Shuttle Radar Topographic Mission (SRTM) DEM offer almost global coverage and provide elevation data for geospatial analysis. However, GDEM and SRTM still contain some height errors that affect the quality of elevation data significantly. This study aims to examine methods to improve the resolution as well as accuracy of available free DEMs by data fusion technique and e

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Cook, A. J., T. Murray, A. Luckman, D. G. Vaughan, and N. E. Barrand. "A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment." Earth System Science Data Discussions 5, no. 1 (2012): 365–403. http://dx.doi.org/10.5194/essdd-5-365-2012.

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Abstract. A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets this specification. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S), based on ASTER Global Digital Elevation Model (GDEM) data. The raw GDEM products are of high-quality on the rugge

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Mouratidis, Antonios, and Dimitrios Ampatzidis. "European Digital Elevation Model Validation against Extensive Global Navigation Satellite Systems Data and Comparison with SRTM DEM and ASTER GDEM in Central Macedonia (Greece)." ISPRS International Journal of Geo-Information 8, no. 3 (2019): 108. http://dx.doi.org/10.3390/ijgi8030108.

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Digital elevation models (DEMs) are a widely used form of topographic information, with some of the most popular being the Shuttle Radar Topography Mission (SRTM) DEM and the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM). These two sources of topographical information are the main constituents of the European Union Digital Elevation Model (EU-DEM), which is a relatively new dataset of the EU’s Copernicus Land Monitoring Service. In this context, the purpose of this study was to validate EU-DEM for its vertical accuracy and to compare

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Hassan, Aqeel Abboud Abdul. "Accuracy Assessment of Open Source Digital Elevation Models." Journal of University of Babylon for Engineering Sciences 26, no. 3 (2018): 23–33. http://dx.doi.org/10.29196/jub.v26i3.601.

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Digital Elevation Model is a three-dimensional representation of the earth's surface, which is essential for Geoscience and hydrological implementations. DEM can be created utilizing Photogrammetry techniques, radar interferometry, laser scanning and land surveying. There are some world agencies provide open source digital elevation models which are freely available for all users, such as the National Aeronautics and Space Administration (NASA), Japan Aerospace Exploration Agency’s (JAXA) and others. ALOS, SRTM and ASTER are satellite based DEMs which are open source products. The technologies

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Octariady, J., A. Hikmat, E. Widyaningrum, R. Mayasari, and M. K. Fajari. "VERTICAL ACCURACY COMPARISON OF DIGITAL ELEVATION MODEL FROM LIDAR AND MULTITEMPORAL SATELLITE IMAGERY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-1/W1 (May 31, 2017): 419–23. http://dx.doi.org/10.5194/isprs-archives-xlii-1-w1-419-2017.

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Digital elevation model serves to illustrate the appearance of the earth's surface. DEM can be produced from a wide variety of data sources including from radar data, LiDAR data, and stereo satellite imagery. Making the LiDAR DEM conducted using point cloud data from LiDAR sensor. Making a DEM from stereo satellite imagery can be done using same temporal or multitemporal stereo satellite imagery. How much the accuracy of DEM generated from multitemporal stereo stellite imagery and LiDAR data is not known with certainty. The study was conducted using LiDAR DEM data and multitemporal stereo sate

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Cui, Yunfan, Shuangming Zhao, Wanshou Jiang, and Guorong Yu. "Urban Building Height Extraction from Gaofen-7 Stereo Satellite Images Enhanced by Contour Matching." Remote Sensing 16, no. 9 (2024): 1556. http://dx.doi.org/10.3390/rs16091556.

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The traditional method for extracting the heights of urban buildings involves utilizing dense matching algorithms on stereo images to generate a digital surface model (DSM). However, for urban buildings, the disparity discontinuity issue that troubles the dense matching algorithm makes the elevations of high-rise buildings and the surrounding areas inaccurate. The occlusion caused by trees in greenbelts makes it difficult to accurately extract the ground elevation around the building. To tackle these problems, a method for building height extraction from Gaofen-7 (GF-7) stereo images enhanced

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Guan, Xiao-Wei, Li-Xin Guo, Ya-Jiao Wang, and Qing-Liang Li. "Parabolic Equation Modeling of Propagation over Terrain Using Digital Elevation Model." International Journal of Antennas and Propagation 2018 (2018): 1–6. http://dx.doi.org/10.1155/2018/1878307.

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The parabolic equation method based on digital elevation model (DEM) is applied on propagation predictions over irregular terrains. Starting from a parabolic approximation to the Helmholtz equation, a wide-angle parabolic equation is deduced under the assumption of forward propagation and the split-step Fourier transform algorithm is used to solve it. The application of DEM is extended to the Cartesian coordinate system and expected to provide a precise representation of a three-dimensional surface with high efficiency. In order to validate the accuracy, a perfectly conducting Gaussian terrain

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Khalid, N. F., A. H. M. Din, K. M. Omar, et al. "OPEN-SOURCE DIGITAL ELEVATION MODEL (DEMs) EVALUATION WITH GPS AND LiDAR DATA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W1 (September 30, 2016): 299–306. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w1-299-2016.

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Advanced Spaceborne Thermal Emission and Reflection Radiometer-Global Digital Elevation Model (ASTER GDEM), Shuttle Radar Topography Mission (SRTM), and Global Multi-resolution Terrain Elevation Data 2010 (GMTED2010) are freely available Digital Elevation Model (DEM) datasets for environmental modeling and studies. The quality of spatial resolution and vertical accuracy of the DEM data source has a great influence particularly on the accuracy specifically for inundation mapping. Most of the coastal inundation risk studies used the publicly available DEM to estimated the coastal inundation and

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Tran, T. A., V. Raghavan, S. Masumoto, P. Vinayaraj, and G. Yonezawa. "A geomorphology-based approach for digital elevation model fusion – case study in Danang city, Vietnam." Earth Surface Dynamics 2, no. 2 (2014): 403–17. http://dx.doi.org/10.5194/esurf-2-403-2014.

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Abstract. Global digital elevation models (DEM) are considered a source of vital spatial information and find wide use in several applications. The Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global DEM (GDEM) and Shuttle Radar Topographic Mission (SRTM) DEM offer almost global coverage and provide elevation data for geospatial analysis. However, GDEM and SRTM still contain some height errors that affect the quality of elevation data significantly. This study aims to examine methods to improve the resolution as well as accuracy of available free DEMs by data fusion t

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Slater, Thomas, Andrew Shepherd, Malcolm McMillan, et al. "A new digital elevation model of Antarctica derived from CryoSat-2 altimetry." Cryosphere 12, no. 4 (2018): 1551–62. http://dx.doi.org/10.5194/tc-12-1551-2018.

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Abstract. We present a new digital elevation model (DEM) of the Antarctic ice sheet and ice shelves based on 2.5×108 observations recorded by the CryoSat-2 satellite radar altimeter between July 2010 and July 2016. The DEM is formed from spatio-temporal fits to elevation measurements accumulated within 1, 2, and 5 km grid cells, and is posted at the modal resolution of 1 km. Altogether, 94 % of the grounded ice sheet and 98 % of the floating ice shelves are observed, and the remaining grid cells north of 88∘ S are interpolated using ordinary kriging. The median and root mean square difference

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Cook, A. J., T. Murray, A. Luckman, D. G. Vaughan, and N. E. Barrand. "A new 100-m Digital Elevation Model of the Antarctic Peninsula derived from ASTER Global DEM: methods and accuracy assessment." Earth System Science Data 4, no. 1 (2012): 129–42. http://dx.doi.org/10.5194/essd-4-129-2012.

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Abstract. A high resolution surface topography Digital Elevation Model (DEM) is required to underpin studies of the complex glacier system on the Antarctic Peninsula. A complete DEM with better than 200 m pixel size and high positional and vertical accuracy would enable mapping of all significant glacial basins and provide a dataset for glacier morphology analyses. No currently available DEM meets these specifications. We present a new 100-m DEM of the Antarctic Peninsula (63–70° S), based on ASTER Global Digital Elevation Model (GDEM) data. The raw GDEM products are of high-quality on the rug

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Dayamit, O. M., M. F. Pedro, R. R. Ernesto, and B. L. Fernando. "DIGITAL ELEVATION MODEL FROM NON-METRIC CAMERA IN UAS COMPARED WITH LIDAR TECHNOLOGY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1/W4 (August 27, 2015): 411–14. http://dx.doi.org/10.5194/isprsarchives-xl-1-w4-411-2015.

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Digital Elevation Model (DEM) data as a representation of surface topography is highly demanded for use in spatial analysis and modelling. Aimed to that issue many methods of acquisition data and process it are developed, from traditional surveying until modern technology like LIDAR. On the other hands, in a past four year the development of Unamend Aerial System (UAS) aimed to Geomatic bring us the possibility to acquire data about surface by non-metric digital camera on board in a short time with good quality for some analysis. Data collectors have attracted tremendous attention on UAS due t

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Durmaz, A. İ. "CREATING DIGITAL ELEVATION MODEL USING A MOBILE DEVICE." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-4/W4 (November 13, 2017): 203–7. http://dx.doi.org/10.5194/isprs-annals-iv-4-w4-203-2017.

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DEM (Digital Elevation Models) is the best way to interpret topography on the ground. In recent years, lidar technology allows to create more accurate elevation models. However, the problem is this technology is not common all over the world. Also if Lidar data are not provided by government agencies freely, people have to pay lots of money to reach these point clouds. In this article, we will discuss how we can create digital elevation model from less accurate mobile devices’ GPS data. Moreover, we will evaluate these data on the same mobile device which we collected data to reduce cost of th

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Hasan, Raghad Hadi. "Evaluation of the Accuracy of Digital Elevation Model Produced from Different Open Source Data." Journal of Engineering 25, no. 8 (2019): 100–112. http://dx.doi.org/10.31026/j.eng.2019.08.07.

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This study aims to estimate the accuracy of digital elevation models (DEM) which are created with exploitation of open source Google Earth data and comparing with the widely available DEM datasets, Shuttle Radar Topography Mission (SRTM), version 3, and Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM), version 2. The GPS technique is used in this study to produce digital elevation raster with a high level of accuracy, as reference raster, compared to the DEM datasets. Baghdad University, Al Jadriya campus, is selected as a study area. B

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Fan, Yubin, Chang-Qing Ke, and Xiaoyi Shen. "A new Greenland digital elevation model derived from ICESat-2 during 2018–2019." Earth System Science Data 14, no. 2 (2022): 781–94. http://dx.doi.org/10.5194/essd-14-781-2022.

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Abstract. Greenland digital elevation models (DEMs) are indispensable to fieldwork, ice velocity calculations, and mass change estimations. Previous DEMs have provided reasonable estimations for all of Greenland, but the time span of applied source data may lead to mass change estimation bias. To provide a DEM with a specific time stamp, we applied approximately 5.8×108 ICESat-2 observations from November 2018 to November 2019 to generate a new DEM, including the ice sheet and glaciers in peripheral Greenland. A spatiotemporal model fit process was performed at 500 m, 1 km, 2 km, and 5 km grid

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Nogami, Michio. "Geomorphometry for Detailed Digital Elevation Model." Geographical Review of Japa,. Ser. A, Chirigaku Hyoron 68, no. 7 (1995): 465–74. http://dx.doi.org/10.4157/grj1984a.68.7_465.

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Gyeltshen, Sangay, Krisha Kumar Subedi, Laylo Zaridinova Kamoliddinovna, and Jigme Tenzin. "Quality Assessment of Globally Available Digital Elevation Model (DEM) for Mountainous Region." Journal of Geographical Studies 5, no. 1 (2021): 11–21. http://dx.doi.org/10.21523/gcj5.21050102.

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The study assessed the accuracies of globally available Digital Elevation Models (DEM’s) i.e., SRTM v3, ASTER GDEM v2 and ALOS PALSAR DEM with respect to Topo-DEM derived from topographic map of 5m contour interval. 100 ground control points of the elevation data were collected with the help of kinematic hand held GNSS (Global Navigation Satellite System), randomly distributed over the study area. The widely used RMSE statistic, NCC correlation and sub-pixel-based approach were applied to evaluate the erroneous, correlation, horizontal and vertical displacement in terms of pixels for the indiv

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Chai, L. T., C. J. Wong, D. James, et al. "Vertical accuracy comparison of multi-source Digital Elevation Model (DEM) with Airborne Light Detection and Ranging (LiDAR)." IOP Conference Series: Earth and Environmental Science 1053, no. 1 (2022): 012025. http://dx.doi.org/10.1088/1755-1315/1053/1/012025.

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Abstract Digital Elevation Model (DEM) is a digital representation of ground surface topography or terrain. There are many freely available DEM data with a spatial resolution of 30 m to 90 m. Nevertheless, their vertical accuracy may vary, depending on the vegetation cover and terrain characteristics. This study examined the vertical accuracy of open-access global DEMs (ALOS PALSAR, ASTER GDEM3, SRTM, TanDEM-X) and fused DEM (EarthEnv-DEM90, MERIT DEM). Their performances were assessed using a Digital Terrain Model (DTM) generated using airborne LiDAR data that had an outstanding absolute vert

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Zhang, Chunsen, Shu Shi, Yingwei Ge, Hengheng Liu, and Weihong Cui. "DEM Void Filling Based on Context Attention Generation Model." ISPRS International Journal of Geo-Information 9, no. 12 (2020): 734. http://dx.doi.org/10.3390/ijgi9120734.

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The digital elevation model (DEM) generates a digital simulation of ground terrain in a certain range with the usage of 3D point cloud data. It is an important source of spatial modeling information. Due to various reasons, however, the generated DEM has data holes. Based on the algorithm of deep learning, this paper aims to train a deep generation model (DGM) to complete the DEM void filling task. A certain amount of DEM data and a randomly generated mask are taken as network inputs, along which the reconstruction loss and generative adversarial network (GAN) loss are used to assist network t

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Wilson, J. D., and K. C. Jezek. "Co-registration of an Antarctic digital elevation model with SSM/I brightness temperatures." Annals of Glaciology 17 (1993): 93–97. http://dx.doi.org/10.3189/s0260305500012660.

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The Special Sensor Microwave/Imager (SMM/I) instrument provides daily measures of microwave brightness temperatures Tb over the polar regions. Data are available from 1987 to the present and have a demonstrated utility for sea-ice studies. In this paper we investigate applications to polar ice sheets with a view towards correlating patterns of Tb with ice-sheet elevation. We go on to discuss the Tb signature of processes linked to temperature anomalies and accumulation zone boundaries.Our approach consists of combining SSM/I Tb values provided on CD-ROM by the National Snow and Ice Data Center

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Wilson, J. D., and K. C. Jezek. "Co-registration of an Antarctic digital elevation model with SSM/I brightness temperatures." Annals of Glaciology 17 (1993): 93–97. http://dx.doi.org/10.1017/s0260305500012660.

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The Special Sensor Microwave/Imager (SMM/I) instrument provides daily measures of microwave brightness temperatures Tb over the polar regions. Data are available from 1987 to the present and have a demonstrated utility for sea-ice studies. In this paper we investigate applications to polar ice sheets with a view towards correlating patterns of Tb with ice-sheet elevation. We go on to discuss the Tb signature of processes linked to temperature anomalies and accumulation zone boundaries. Our approach consists of combining SSM/I Tb values provided on CD-ROM by the National Snow and Ice Data Cente

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