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Journals
Die Bodenkultur: Journal of Land Management, Food and Environment
Volume 74 (2023): Issue 1 (March 2023)
Open Access
Using open-source software GRASS GIS for analysis of the environmental patterns in Lake Chad, Central Africa
Polina Lemenkova
Polina Lemenkova
| Nov 15, 2023
Die Bodenkultur: Journal of Land Management, Food and Environment
Volume 74 (2023): Issue 1 (March 2023)
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Published Online:
Nov 15, 2023
Page range:
49 - 64
Received:
Jun 13, 2023
Accepted:
Sep 11, 2023
DOI:
https://doi.org/10.2478/boku-2023-0005
Keywords
Sahel
,
remote sensing
,
geoinformation
,
cartography
,
scripting language
© 2023 Polina Lemenkova, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Figure 1.
Topographic map of Chad. Map source: made by the author using GMT software.Abbildung 1. Topografische Karte des Tschad. Kartenquelle: erstellt vom Autor nutzend GMT-Software.
Figure 2.
Geologic units of Chad. Map source: made by the author using QGIS software.Abbildung 2. Geologische Einheiten des Tschad. Kartenquelle: erstellt vom Autor nutzend QGIS-Software.
Figure 3.
Geologic provinces in Chad. Map source: made by the author using QGIS software.Abbildung 3. Geologische Provinzen im Tschad. Kartenquelle: erstellt vom Autor nutzend QGIS-Software.
Figure 4.
Landsat 8 OLI/TIRS image of Lake Chad in natural RGB colors: (left) November 22, 2013, (center) November 17, 2017, (right) December 09, 2022.Abbildung 4. Landsat 8 OLI/TIRS-Bild des Tschadsees, in natürlichen RGB-Farben: (Links) 22. November 2013, (Mitte) 17. November 2017, (Rechts) 09. Dezember 2022.
Figure 5.
Landsat 8–9 OLI/TIRS image of Lake Chad classified into 12 classes of land cover types: (a) 2013 map, (b) 2017 map, (c) 2022 map.Abbildung 5. Das Landsat 8–9 OLI/TIRS-Bild des Tschadsees, klassifiziert in 12 Klassen von Landbedeckungstypen: (a) Karte von 2013, (b) Karte von 2017, (c) Karte von 2022.
Figure 6.
The rejection probability values with pixel classification confidence levels for Landsat 8–9 OLI/TIRS images of Lake Chad: (a) 2013, (b) 2017, c) 2022.Abbildung 6. Die Ablehnungswahrscheinlichkeitswerte mit Pixelklassifizierungs-Konfidenzniveaus für Landsat 8–9 OLI/TIRS-Bilder des Tschadsees: (a) 2013, (b) 2017, c) 2022.