Improving merge methods for grid-based digital elevation models
Само за регистроване кориснике
2016
Чланак у часопису (Објављена верзија)
Метаподаци
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Digital Elevation Models (DEMs) are used to represent the terrain in applications such as, for example, overland flow modelling or viewshed analysis. DEMs generated from digitising contour lines or obtained by LiDAR or satellite data are now widely available. However, in some cases, the area of study is covered by more than one of the available elevation data sets. In these cases the relevant DEMs may need to be merged. The merged DEM must retain the most accurate elevation information available while generating consistent slopes and aspects. In this paper we present a thorough analysis of three conventional grid-based DEM merging methods that are available in commercial GIS software. These methods are evaluated for their applicability in merging DEMs and, based on evaluation results, a method for improving the merging of grid-based DEMs is proposed. DEMs generated by the proposed method, called Id:Blend, showed significant improvements when compared to DEMs produced by the three conve...ntional methods in terms of elevation, slope and aspect accuracy, ensuring also smooth elevation transitions between the original DEMs. The results produced by the improved method are highly relevant different applications in terrain analysis, e.g., visibility, or spotting irregularities in landforms and for modelling terrain phenomena, such as overland flow.
Кључне речи:
Data merging / Digital elevation models / Grid-based rasters / Terrain analysisИзвор:
Computers & Geosciences, 2016, 88, 115-131Издавач:
- Elsevier Ltd
DOI: 10.1016/j.cageo.2016.01.001
ISSN: 0098-3004
WoS: 000370456200010
Scopus: 2-s2.0-84953854825
Колекције
Институција/група
GraFarTY - JOUR AU - Leitao, Joao P. AU - Prodanović, Dušan AU - Maksimović, Čedo PY - 2016 UR - https://grafar.grf.bg.ac.rs/handle/123456789/792 AB - Digital Elevation Models (DEMs) are used to represent the terrain in applications such as, for example, overland flow modelling or viewshed analysis. DEMs generated from digitising contour lines or obtained by LiDAR or satellite data are now widely available. However, in some cases, the area of study is covered by more than one of the available elevation data sets. In these cases the relevant DEMs may need to be merged. The merged DEM must retain the most accurate elevation information available while generating consistent slopes and aspects. In this paper we present a thorough analysis of three conventional grid-based DEM merging methods that are available in commercial GIS software. These methods are evaluated for their applicability in merging DEMs and, based on evaluation results, a method for improving the merging of grid-based DEMs is proposed. DEMs generated by the proposed method, called Id:Blend, showed significant improvements when compared to DEMs produced by the three conventional methods in terms of elevation, slope and aspect accuracy, ensuring also smooth elevation transitions between the original DEMs. The results produced by the improved method are highly relevant different applications in terrain analysis, e.g., visibility, or spotting irregularities in landforms and for modelling terrain phenomena, such as overland flow. PB - Elsevier Ltd T2 - Computers & Geosciences T1 - Improving merge methods for grid-based digital elevation models EP - 131 SP - 115 VL - 88 DO - 10.1016/j.cageo.2016.01.001 ER -
@article{ author = "Leitao, Joao P. and Prodanović, Dušan and Maksimović, Čedo", year = "2016", abstract = "Digital Elevation Models (DEMs) are used to represent the terrain in applications such as, for example, overland flow modelling or viewshed analysis. DEMs generated from digitising contour lines or obtained by LiDAR or satellite data are now widely available. However, in some cases, the area of study is covered by more than one of the available elevation data sets. In these cases the relevant DEMs may need to be merged. The merged DEM must retain the most accurate elevation information available while generating consistent slopes and aspects. In this paper we present a thorough analysis of three conventional grid-based DEM merging methods that are available in commercial GIS software. These methods are evaluated for their applicability in merging DEMs and, based on evaluation results, a method for improving the merging of grid-based DEMs is proposed. DEMs generated by the proposed method, called Id:Blend, showed significant improvements when compared to DEMs produced by the three conventional methods in terms of elevation, slope and aspect accuracy, ensuring also smooth elevation transitions between the original DEMs. The results produced by the improved method are highly relevant different applications in terrain analysis, e.g., visibility, or spotting irregularities in landforms and for modelling terrain phenomena, such as overland flow.", publisher = "Elsevier Ltd", journal = "Computers & Geosciences", title = "Improving merge methods for grid-based digital elevation models", pages = "131-115", volume = "88", doi = "10.1016/j.cageo.2016.01.001" }
Leitao, J. P., Prodanović, D.,& Maksimović, Č.. (2016). Improving merge methods for grid-based digital elevation models. in Computers & Geosciences Elsevier Ltd., 88, 115-131. https://doi.org/10.1016/j.cageo.2016.01.001
Leitao JP, Prodanović D, Maksimović Č. Improving merge methods for grid-based digital elevation models. in Computers & Geosciences. 2016;88:115-131. doi:10.1016/j.cageo.2016.01.001 .
Leitao, Joao P., Prodanović, Dušan, Maksimović, Čedo, "Improving merge methods for grid-based digital elevation models" in Computers & Geosciences, 88 (2016):115-131, https://doi.org/10.1016/j.cageo.2016.01.001 . .