Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS

This paper presents using GDAL utilities and GRASS GIS for topographic analysis of the raster grids based on GEBCO DEM as NetCDF file at 15 arc-second intervals. The focus study area encompasses the area around Okinawa Trough, Ryukyu trench-arc system, southern Japan, East China Sea and the Philippi...

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Autor principal:	Lemenkova Polina
Formato:	article
Lenguaje:	EN SR
Publicado:	Faculty of Mining and Geology, Belgrade 2021
Materias:	topography grass gis gdal roughness ruggedness Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/0577a0bf760c49f9a0af1eb12735ebc1
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id	oai:doaj.org-article:0577a0bf760c49f9a0af1eb12735ebc1
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spelling	oai:doaj.org-article:0577a0bf760c49f9a0af1eb12735ebc12021-12-05T21:29:30ZOkinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS0354-29042560-333710.5937/podrad2138087Lhttps://doaj.org/article/0577a0bf760c49f9a0af1eb12735ebc12021-01-01T00:00:00Zhttps://scindeks-clanci.ceon.rs/data/pdf/0354-2904/2021/0354-29042138087L.pdfhttps://doaj.org/toc/0354-2904https://doaj.org/toc/2560-3337This paper presents using GDAL utilities and GRASS GIS for topographic analysis of the raster grids based on GEBCO DEM as NetCDF file at 15 arc-second intervals. The focus study area encompasses the area around Okinawa Trough, Ryukyu trench-arc system, southern Japan, East China Sea and the Philippine Sea, West Pacific Ocean. Several GDAL utilities were applied for data processing: gdaldem, gdalwarp, gdalinfo, gdal_translate. The data were imported to GRASS GIS via r.in.gdal. Data visualization highlighted high resolution and accuracy of GEBCO grid, enabling topographic modelling at the advanced level. The algorithm of DEM processing, implemented in GDAL utility gdaldem, was used for generating multi-purpose topographic models: aspect, hillshade, roughness and topographic indices, such as Topographic Position Index (TPI), Terrain Ruggedness Index (TRI). Thematic maps (topography, geoid, marine free-air gravity) were visualized using GRASS GIS modules for raster (d.rast, r.colors, r.contour) and vector (d.vect, v.in.region, d.legend) data processing. The results demonstrated smoother bathymetry in the East China Sea and rugged relief in the Philippine Sea which corresponds to their different geological and geophysical settings. The presented methodology of the topographic analysis based on DEM demonstrated technical aspects of GDAL and GRASS as scripting approach of advanced cartography.Lemenkova PolinaFaculty of Mining and Geology, Belgradearticletopographygrass gisgdalroughnessruggednessGeologyQE1-996.5ENSRPodzemni Radovi, Vol 2021, Iss 38, Pp 87-100 (2021)
institution	DOAJ
collection	DOAJ
language	EN SR
topic	topography grass gis gdal roughness ruggedness Geology QE1-996.5
spellingShingle	topography grass gis gdal roughness ruggedness Geology QE1-996.5 Lemenkova Polina Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
description	This paper presents using GDAL utilities and GRASS GIS for topographic analysis of the raster grids based on GEBCO DEM as NetCDF file at 15 arc-second intervals. The focus study area encompasses the area around Okinawa Trough, Ryukyu trench-arc system, southern Japan, East China Sea and the Philippine Sea, West Pacific Ocean. Several GDAL utilities were applied for data processing: gdaldem, gdalwarp, gdalinfo, gdal_translate. The data were imported to GRASS GIS via r.in.gdal. Data visualization highlighted high resolution and accuracy of GEBCO grid, enabling topographic modelling at the advanced level. The algorithm of DEM processing, implemented in GDAL utility gdaldem, was used for generating multi-purpose topographic models: aspect, hillshade, roughness and topographic indices, such as Topographic Position Index (TPI), Terrain Ruggedness Index (TRI). Thematic maps (topography, geoid, marine free-air gravity) were visualized using GRASS GIS modules for raster (d.rast, r.colors, r.contour) and vector (d.vect, v.in.region, d.legend) data processing. The results demonstrated smoother bathymetry in the East China Sea and rugged relief in the Philippine Sea which corresponds to their different geological and geophysical settings. The presented methodology of the topographic analysis based on DEM demonstrated technical aspects of GDAL and GRASS as scripting approach of advanced cartography.
format	article
author	Lemenkova Polina
author_facet	Lemenkova Polina
author_sort	Lemenkova Polina
title	Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
title_short	Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
title_full	Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
title_fullStr	Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
title_full_unstemmed	Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS
title_sort	okinawa trough geophysical and topographic modeling by gdal utilities and grass gis
publisher	Faculty of Mining and Geology, Belgrade
publishDate	2021
url	https://doaj.org/article/0577a0bf760c49f9a0af1eb12735ebc1
work_keys_str_mv	AT lemenkovapolina okinawatroughgeophysicalandtopographicmodelingbygdalutilitiesandgrassgis
_version_	1718370922707025920

Okinawa Trough geophysical and topographic modeling by GDAL utilities and GRASS GIS

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