Analysis of the relationship of automatically and manually extracted lineaments from DEM and geologically mapped tectonic faults around the Main Ethiopian Rift and the Ethiopian Highlands, Ethiopia

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10328576" target="_blank" >RIV/00216208:11310/17:10328576 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/17:00476683

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of the relationship of automatically and manually extracted lineaments from DEM and geologically mapped tectonic faults around the Main Ethiopian Rift and the Ethiopian Highlands, Ethiopia

Popis výsledku v původním jazyce

The paper deals with the functions that automatically extract lineaments from the 90 m Shuttle Radar Topographic Mission (SRTM) of Digital Elevation Model (DEM) (Consortium for Spatial Information 2014) in the software ArcGIS 10.1 and PCI Geomatica. They were performed for the Main Ethiopian Rift and the Ethiopian Highlands (transregional scale 1,060,000 km2), which are one of the tectonically most active areas in the world. The values of input parameters - the RADI (filter radius) value, GTHR (edge gradient threshold), LTHR (curve length), FTHR (line fitting error), ATHR (angular difference), and the DTHR (linked distance threshold) - and their influence on the final shape and number of lineaments are discussed. A map of automated extracted lineaments was created and compared with 1) the tectonic faults on the geological map by Geological Survey of Ethiopia (Mangesha et al. 1996); and 2) the lineaments based on visual interpretation by the author from the same data set. The predominant azimuth of lineaments is similar to the azimuth of the faults on the geological map. The comparison of lineaments by automated visualization in GIS and visual interpretation of lineaments carried out by the authors around the Jemma River Basin (regional scale 16,000 km2) proved that both sets of lineaments are of the same NE-SW azimuth, which is the orientation of the rift. However, lineaments mapping by automated visualization in GIS identifies a larger number of shorter lineaments than lineaments created by visual interpretation.

Název v anglickém jazyce

Analysis of the relationship of automatically and manually extracted lineaments from DEM and geologically mapped tectonic faults around the Main Ethiopian Rift and the Ethiopian Highlands, Ethiopia

Popis výsledku anglicky

The paper deals with the functions that automatically extract lineaments from the 90 m Shuttle Radar Topographic Mission (SRTM) of Digital Elevation Model (DEM) (Consortium for Spatial Information 2014) in the software ArcGIS 10.1 and PCI Geomatica. They were performed for the Main Ethiopian Rift and the Ethiopian Highlands (transregional scale 1,060,000 km2), which are one of the tectonically most active areas in the world. The values of input parameters - the RADI (filter radius) value, GTHR (edge gradient threshold), LTHR (curve length), FTHR (line fitting error), ATHR (angular difference), and the DTHR (linked distance threshold) - and their influence on the final shape and number of lineaments are discussed. A map of automated extracted lineaments was created and compared with 1) the tectonic faults on the geological map by Geological Survey of Ethiopia (Mangesha et al. 1996); and 2) the lineaments based on visual interpretation by the author from the same data set. The predominant azimuth of lineaments is similar to the azimuth of the faults on the geological map. The comparison of lineaments by automated visualization in GIS and visual interpretation of lineaments carried out by the authors around the Jemma River Basin (regional scale 16,000 km2) proved that both sets of lineaments are of the same NE-SW azimuth, which is the orientation of the rift. However, lineaments mapping by automated visualization in GIS identifies a larger number of shorter lineaments than lineaments created by visual interpretation.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

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OECD FORD obor

10508 - Physical geography

Projekt

<a href="/cs/project/GCP209%2F12%2FJ068" target="_blank" >GCP209/12/J068: Výzkum svahových pohybů a eroze jako indikátoru morfotektonické aktivity Etiopské vysočiny založený na DPZ</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta Universitatis Carolinae. Geographica

ISSN

0300-5402

e-ISSN

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Svazek periodika

52

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

13

Strana od-do

5-17

Kód UT WoS článku

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EID výsledku v databázi Scopus

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