SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness
International audience Summary The study presents a comparative analysis of eight Vegetation Indices (VIs) used to examine vegetation greenness over the northern coasts of Iceland. The geographical extent of the study area is set by the coordinates of the two fjords, Eyjafjörður and Skagafjörður, no...
Published in: | Contemporary Agriculture |
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2021
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Online Access: | https://doi.org/10.2478/contagri-2021-0011 https://hal.archives-ouvertes.fr/hal-03240608/file/10.2478_contagri-2021-0011.pdf https://hal.archives-ouvertes.fr/hal-03240608 |
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fttriple:oai:gotriple.eu:10670/1.erpuwr 2023-05-15T15:18:32+02:00 SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness Lemenkova, Polina Schmidt United Institute of Physics of the Earth Moscow (IPE) Russian Academy of Sciences Moscow (RAS) 2021-06-01 https://doi.org/10.2478/contagri-2021-0011 https://hal.archives-ouvertes.fr/hal-03240608/file/10.2478_contagri-2021-0011.pdf https://hal.archives-ouvertes.fr/hal-03240608 en eng HAL CCSD hal-03240608 doi:10.2478/contagri-2021-0011 10670/1.erpuwr https://hal.archives-ouvertes.fr/hal-03240608/file/10.2478_contagri-2021-0011.pdf https://hal.archives-ouvertes.fr/hal-03240608 lic_creative-commons other Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 2466-4774 Contemporary Agriculture Contemporary Agriculture, 2021, 70 (1-2), pp.67-75. ⟨10.2478/contagri-2021-0011⟩ Iceland vegetation indices NDVI SAGA GIS cartography mapping geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.2478/contagri-2021-0011 2023-01-22T16:47:19Z International audience Summary The study presents a comparative analysis of eight Vegetation Indices (VIs) used to examine vegetation greenness over the northern coasts of Iceland. The geographical extent of the study area is set by the coordinates of the two fjords, Eyjafjörður and Skagafjörður, notable for their agricultural significance. Vegetation in Iceland is fragile due to the harsh climate, climate change, overgrazing and volcanic activity, which increase soil erosion. The study was conducted on a Landsat TM image using SAGA GIS as a technical tool for raster bands calculations. The NDVI dataset shows a range from -0.56 to 0.24, with 0 indicating ‘no vegetation’, and negative values – ‘other surfaces’ (e.g. rocks, open terrain). The DVI, compared to the NDVI, shows statistically non-normalized values ranging from -112 to 0, with extreme negative values while the coastal vegetation areas are badly distinguished from the water areas. The NRVI shows an extent from -0.24 to 0.48 with higher values for vegetation. The NRVI reduces topographic, solar and atmospheric effects and creates a normal data distribution. RVI shows a range in a dataset from 0.2 to 3.2 with vegetation in the river valleys clearly visible and depicted, while the water areas have values 0.8 to 1.0. The CTVI shows corrected TVI, in a data range -0.10 to 1.10, as the dataset of NDVI were negative. The TVI dataset ranges from 0.44 to 0.80 with the ice-covered areas and glaciers distinguishable and water values within a range from 0.60 to 0.64 and the vegetation from 0.60 to 0.44. The TTVI dataset ranges from 0.40 to 0.80 performing similarly to the TVI, but more refined with vegetation values 0.64 to 0.68. SAVI dataset ranges from -0.80 to 0.30 with minimized effects of soil on the vegetation through a constant soil adjustment factor added into the NDVI formula. The paper presents a comparison of eight VIs for Arctic vegetation monitoring. The overall behavior of SAGA GIS in calculation and mapping of the VIs is effective in terms of their ... Article in Journal/Newspaper Arctic Climate change Iceland ice covered areas Unknown Arctic Eyjafjörður ENVELOPE(-18.150,-18.150,65.500,65.500) Skagafjörður ENVELOPE(-19.561,-19.561,65.875,65.875) Contemporary Agriculture 70 1-2 67 75 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Iceland vegetation indices NDVI SAGA GIS cartography mapping geo envir |
spellingShingle |
Iceland vegetation indices NDVI SAGA GIS cartography mapping geo envir Lemenkova, Polina SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
topic_facet |
Iceland vegetation indices NDVI SAGA GIS cartography mapping geo envir |
description |
International audience Summary The study presents a comparative analysis of eight Vegetation Indices (VIs) used to examine vegetation greenness over the northern coasts of Iceland. The geographical extent of the study area is set by the coordinates of the two fjords, Eyjafjörður and Skagafjörður, notable for their agricultural significance. Vegetation in Iceland is fragile due to the harsh climate, climate change, overgrazing and volcanic activity, which increase soil erosion. The study was conducted on a Landsat TM image using SAGA GIS as a technical tool for raster bands calculations. The NDVI dataset shows a range from -0.56 to 0.24, with 0 indicating ‘no vegetation’, and negative values – ‘other surfaces’ (e.g. rocks, open terrain). The DVI, compared to the NDVI, shows statistically non-normalized values ranging from -112 to 0, with extreme negative values while the coastal vegetation areas are badly distinguished from the water areas. The NRVI shows an extent from -0.24 to 0.48 with higher values for vegetation. The NRVI reduces topographic, solar and atmospheric effects and creates a normal data distribution. RVI shows a range in a dataset from 0.2 to 3.2 with vegetation in the river valleys clearly visible and depicted, while the water areas have values 0.8 to 1.0. The CTVI shows corrected TVI, in a data range -0.10 to 1.10, as the dataset of NDVI were negative. The TVI dataset ranges from 0.44 to 0.80 with the ice-covered areas and glaciers distinguishable and water values within a range from 0.60 to 0.64 and the vegetation from 0.60 to 0.44. The TTVI dataset ranges from 0.40 to 0.80 performing similarly to the TVI, but more refined with vegetation values 0.64 to 0.68. SAVI dataset ranges from -0.80 to 0.30 with minimized effects of soil on the vegetation through a constant soil adjustment factor added into the NDVI formula. The paper presents a comparison of eight VIs for Arctic vegetation monitoring. The overall behavior of SAGA GIS in calculation and mapping of the VIs is effective in terms of their ... |
author2 |
Schmidt United Institute of Physics of the Earth Moscow (IPE) Russian Academy of Sciences Moscow (RAS) |
format |
Article in Journal/Newspaper |
author |
Lemenkova, Polina |
author_facet |
Lemenkova, Polina |
author_sort |
Lemenkova, Polina |
title |
SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
title_short |
SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
title_full |
SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
title_fullStr |
SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
title_full_unstemmed |
SAGA GIS for Computing Multispectral Vegetation Indices by Landsat TM for Mapping Vegetation Greenness |
title_sort |
saga gis for computing multispectral vegetation indices by landsat tm for mapping vegetation greenness |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://doi.org/10.2478/contagri-2021-0011 https://hal.archives-ouvertes.fr/hal-03240608/file/10.2478_contagri-2021-0011.pdf https://hal.archives-ouvertes.fr/hal-03240608 |
long_lat |
ENVELOPE(-18.150,-18.150,65.500,65.500) ENVELOPE(-19.561,-19.561,65.875,65.875) |
geographic |
Arctic Eyjafjörður Skagafjörður |
geographic_facet |
Arctic Eyjafjörður Skagafjörður |
genre |
Arctic Climate change Iceland ice covered areas |
genre_facet |
Arctic Climate change Iceland ice covered areas |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société ISSN: 2466-4774 Contemporary Agriculture Contemporary Agriculture, 2021, 70 (1-2), pp.67-75. ⟨10.2478/contagri-2021-0011⟩ |
op_relation |
hal-03240608 doi:10.2478/contagri-2021-0011 10670/1.erpuwr https://hal.archives-ouvertes.fr/hal-03240608/file/10.2478_contagri-2021-0011.pdf https://hal.archives-ouvertes.fr/hal-03240608 |
op_rights |
lic_creative-commons other |
op_doi |
https://doi.org/10.2478/contagri-2021-0011 |
container_title |
Contemporary Agriculture |
container_volume |
70 |
container_issue |
1-2 |
container_start_page |
67 |
op_container_end_page |
75 |
_version_ |
1766348723069124608 |