AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS
The paper presents a sequential use of the AWK and GNU Octave programming languages integrated with Generic Mapping Tools (GMT) for geospatial data analysis. The geographic scope of the research is focused on the Kuril-Kamchatka Trench, north Pacific Ocean. Practical research aim is to analyse and c...
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VSB-Technical University of Ostrava
2019
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ftdoajarticles:oai:doaj.org/article:2ad511e186c84bb6b7f9f2db78778e4f 2023-05-15T16:59:24+02:00 AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS Polina LEMENKOVA 2019-12-01T00:00:00Z https://doi.org/10.35180/gse-2019-0020 https://doaj.org/article/2ad511e186c84bb6b7f9f2db78778e4f EN eng VSB-Technical University of Ostrava http://gse.vsb.cz/ojs/index.php/GSE/article/view/267/190 https://doaj.org/toc/1802-5420 doi:10.35180/gse-2019-0020 1802-5420 https://doaj.org/article/2ad511e186c84bb6b7f9f2db78778e4f GeoScience Engineering, Vol 65, Iss 4, Pp 1-22 (2019) awk octave gmt programming language data analysis geospatial analysis trench Geology QE1-996.5 article 2019 ftdoajarticles https://doi.org/10.35180/gse-2019-0020 2022-12-31T02:55:42Z The paper presents a sequential use of the AWK and GNU Octave programming languages integrated with Generic Mapping Tools (GMT) for geospatial data analysis. The geographic scope of the research is focused on the Kuril-Kamchatka Trench, north Pacific Ocean. Practical research aim is to analyse and compare bathymetry in the southern and northern part of the trench using digitized cross-section profiles. The initial mapping and geospatial analysis was performed in GMT scripting toolset. The GMT was used for cartographic mapping based on the raster ETOPO1 grid and automatic digitizing of the profiles crossing the trench perpendicularly. Besides visualized map, the processed geodata were received in a numerical form as a complex multi-field table for each segment. These tables were generated by the GMT in its native format and could not be directly processed by the MATLAB/Octave. Therefore, the tables were exported to AWK, a data-driven programming language and a powerful tool for data extraction. The table was then restructured, sorted and reshaped by the AWK script. Because the total amount of profiles overstepped 100 (62 and 52 for the northern and southern trench segments), only selected profiles were visualized. For this purpose, at the next step, the modified tables were converted to GNU Octave language for visualizing and plotting selected profiles. Finally, the geomorphology was analysed and two segments compared. The results show that the southern part has deeper bathymetric values, vary in geomorphic structure and has steeper gradient slopes comparing to the north, which is caused by the seismicity, volcanism, geologic and tectonic settings. Three full scripts of GMT, AWK and GNU Octave programming languages are presented for replicability in the Appendix. Article in Journal/Newspaper Kamchatka Directory of Open Access Journals: DOAJ Articles Pacific GeoScience Engineering 65 4 1 22 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
awk octave gmt programming language data analysis geospatial analysis trench Geology QE1-996.5 |
spellingShingle |
awk octave gmt programming language data analysis geospatial analysis trench Geology QE1-996.5 Polina LEMENKOVA AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
topic_facet |
awk octave gmt programming language data analysis geospatial analysis trench Geology QE1-996.5 |
description |
The paper presents a sequential use of the AWK and GNU Octave programming languages integrated with Generic Mapping Tools (GMT) for geospatial data analysis. The geographic scope of the research is focused on the Kuril-Kamchatka Trench, north Pacific Ocean. Practical research aim is to analyse and compare bathymetry in the southern and northern part of the trench using digitized cross-section profiles. The initial mapping and geospatial analysis was performed in GMT scripting toolset. The GMT was used for cartographic mapping based on the raster ETOPO1 grid and automatic digitizing of the profiles crossing the trench perpendicularly. Besides visualized map, the processed geodata were received in a numerical form as a complex multi-field table for each segment. These tables were generated by the GMT in its native format and could not be directly processed by the MATLAB/Octave. Therefore, the tables were exported to AWK, a data-driven programming language and a powerful tool for data extraction. The table was then restructured, sorted and reshaped by the AWK script. Because the total amount of profiles overstepped 100 (62 and 52 for the northern and southern trench segments), only selected profiles were visualized. For this purpose, at the next step, the modified tables were converted to GNU Octave language for visualizing and plotting selected profiles. Finally, the geomorphology was analysed and two segments compared. The results show that the southern part has deeper bathymetric values, vary in geomorphic structure and has steeper gradient slopes comparing to the north, which is caused by the seismicity, volcanism, geologic and tectonic settings. Three full scripts of GMT, AWK and GNU Octave programming languages are presented for replicability in the Appendix. |
format |
Article in Journal/Newspaper |
author |
Polina LEMENKOVA |
author_facet |
Polina LEMENKOVA |
author_sort |
Polina LEMENKOVA |
title |
AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
title_short |
AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
title_full |
AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
title_fullStr |
AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
title_full_unstemmed |
AWK AND GNU OCTAVE PROGRAMMING LANGUAGES INTEGRATED WITH GENERIC MAPPING TOOLS FOR GEOMORPHOLOGICAL ANALYSIS |
title_sort |
awk and gnu octave programming languages integrated with generic mapping tools for geomorphological analysis |
publisher |
VSB-Technical University of Ostrava |
publishDate |
2019 |
url |
https://doi.org/10.35180/gse-2019-0020 https://doaj.org/article/2ad511e186c84bb6b7f9f2db78778e4f |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
GeoScience Engineering, Vol 65, Iss 4, Pp 1-22 (2019) |
op_relation |
http://gse.vsb.cz/ojs/index.php/GSE/article/view/267/190 https://doaj.org/toc/1802-5420 doi:10.35180/gse-2019-0020 1802-5420 https://doaj.org/article/2ad511e186c84bb6b7f9f2db78778e4f |
op_doi |
https://doi.org/10.35180/gse-2019-0020 |
container_title |
GeoScience Engineering |
container_volume |
65 |
container_issue |
4 |
container_start_page |
1 |
op_container_end_page |
22 |
_version_ |
1766051660039192576 |