NDEI-BASED MAPPING OF LAND SURFACE CHANGES
Topography measurements of land surface elevation changes are essential for geomorphological studies and research on natural hazards. However, conventional topography and remote sensing methods pose several challenges. Fieldwork in remote areas could be insecure or be hard to conduct due to physical...
Published in: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
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Online Access: | https://doi.org/10.5194/isprs-archives-XLII-3-W8-31-2019 https://doaj.org/article/753d4dfb3d88472ea6cb93e2a06405a7 |
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ftdoajarticles:oai:doaj.org/article:753d4dfb3d88472ea6cb93e2a06405a7 2023-05-15T16:38:21+02:00 NDEI-BASED MAPPING OF LAND SURFACE CHANGES V. A. Morales J. R. Galvis E. G. García I. L. Salcedo 2019-08-01T00:00:00Z https://doi.org/10.5194/isprs-archives-XLII-3-W8-31-2019 https://doaj.org/article/753d4dfb3d88472ea6cb93e2a06405a7 EN eng Copernicus Publications https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-3-W8/31/2019/isprs-archives-XLII-3-W8-31-2019.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLII-3-W8-31-2019 1682-1750 2194-9034 https://doaj.org/article/753d4dfb3d88472ea6cb93e2a06405a7 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-3-W8, Pp 31-36 (2019) Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 article 2019 ftdoajarticles https://doi.org/10.5194/isprs-archives-XLII-3-W8-31-2019 2022-12-31T02:23:46Z Topography measurements of land surface elevation changes are essential for geomorphological studies and research on natural hazards. However, conventional topography and remote sensing methods pose several challenges. Fieldwork in remote areas could be insecure or be hard to conduct due to physical barriers. Remote sensing satellite images, in turn, may lack the temporal resolution for monitoring topography changes or be covered by clouds and shadows that reduce their usefulness. Unmanned Aerial Vehicles (UAV) provide high-resolution imagery from remote areas and may give a greater insight into land surface changes. Previous studies have demonstrated the potential of the Normalized Difference Elevation Index (NDEI), derived from UAV surveys, to map changes in topography in different environments, including a quarry zone of sand mines in Colombia, and in the North Pole Ice Cap. As the NDEI is a metric capable to reveal topography disturbances, it could be exploited for rapid assessments of mass movements occurrence. For this research, a fine temporal resolution dataset of monthly NDEI values were used to explore their utility as a mass wasting identification technique. NDEI was used to map changes in the land surface in a quarry zone affected by landslides and mudflows. NDEI values were obtained from the multi-temporal analysis of digital surface models generated from UAV images and processed using Structure from motion (SfM) techniques. Main components of the proposed method are: (i)UAVbased imagery data capture, (ii)data processing using SfM techniques, (iii)NDEI calculation, and (iv)mass movement identification. Results illustrate the feasibility of using UAV-based imagery data to increase the accuracy of land changes information and produce rapid assessments of mass movements occurrence. Results show that the NDEI approach may increase the accuracy of land surface changes assessment and mapping, as well as enable the design of new methodologies to identify natural hazards and risks. Article in Journal/Newspaper Ice cap North Pole Directory of Open Access Journals: DOAJ Articles North Pole The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W8 31 36 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
spellingShingle |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 V. A. Morales J. R. Galvis E. G. García I. L. Salcedo NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
topic_facet |
Technology T Engineering (General). Civil engineering (General) TA1-2040 Applied optics. Photonics TA1501-1820 |
description |
Topography measurements of land surface elevation changes are essential for geomorphological studies and research on natural hazards. However, conventional topography and remote sensing methods pose several challenges. Fieldwork in remote areas could be insecure or be hard to conduct due to physical barriers. Remote sensing satellite images, in turn, may lack the temporal resolution for monitoring topography changes or be covered by clouds and shadows that reduce their usefulness. Unmanned Aerial Vehicles (UAV) provide high-resolution imagery from remote areas and may give a greater insight into land surface changes. Previous studies have demonstrated the potential of the Normalized Difference Elevation Index (NDEI), derived from UAV surveys, to map changes in topography in different environments, including a quarry zone of sand mines in Colombia, and in the North Pole Ice Cap. As the NDEI is a metric capable to reveal topography disturbances, it could be exploited for rapid assessments of mass movements occurrence. For this research, a fine temporal resolution dataset of monthly NDEI values were used to explore their utility as a mass wasting identification technique. NDEI was used to map changes in the land surface in a quarry zone affected by landslides and mudflows. NDEI values were obtained from the multi-temporal analysis of digital surface models generated from UAV images and processed using Structure from motion (SfM) techniques. Main components of the proposed method are: (i)UAVbased imagery data capture, (ii)data processing using SfM techniques, (iii)NDEI calculation, and (iv)mass movement identification. Results illustrate the feasibility of using UAV-based imagery data to increase the accuracy of land changes information and produce rapid assessments of mass movements occurrence. Results show that the NDEI approach may increase the accuracy of land surface changes assessment and mapping, as well as enable the design of new methodologies to identify natural hazards and risks. |
format |
Article in Journal/Newspaper |
author |
V. A. Morales J. R. Galvis E. G. García I. L. Salcedo |
author_facet |
V. A. Morales J. R. Galvis E. G. García I. L. Salcedo |
author_sort |
V. A. Morales |
title |
NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
title_short |
NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
title_full |
NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
title_fullStr |
NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
title_full_unstemmed |
NDEI-BASED MAPPING OF LAND SURFACE CHANGES |
title_sort |
ndei-based mapping of land surface changes |
publisher |
Copernicus Publications |
publishDate |
2019 |
url |
https://doi.org/10.5194/isprs-archives-XLII-3-W8-31-2019 https://doaj.org/article/753d4dfb3d88472ea6cb93e2a06405a7 |
geographic |
North Pole |
geographic_facet |
North Pole |
genre |
Ice cap North Pole |
genre_facet |
Ice cap North Pole |
op_source |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLII-3-W8, Pp 31-36 (2019) |
op_relation |
https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-3-W8/31/2019/isprs-archives-XLII-3-W8-31-2019.pdf https://doaj.org/toc/1682-1750 https://doaj.org/toc/2194-9034 doi:10.5194/isprs-archives-XLII-3-W8-31-2019 1682-1750 2194-9034 https://doaj.org/article/753d4dfb3d88472ea6cb93e2a06405a7 |
op_doi |
https://doi.org/10.5194/isprs-archives-XLII-3-W8-31-2019 |
container_title |
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
container_volume |
XLII-3/W8 |
container_start_page |
31 |
op_container_end_page |
36 |
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1766028631445864448 |