Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo
The estimation of three-dimensional (3D) vegetation metrics from space-borne LiDAR allows to capture spatio-temporal trends in forest ecosystems. Structural traits from the NASA Global Ecosystem Dynamics Investigation (GEDI) are vital to support forest monitoring, restoration and biodiversity protec...
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Elsevier
2025-06-01
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| Series: | Science of Remote Sensing |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266601722500001X |
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| author | Aaron Cardenas-Martinez Adrian Pascual Emilia Guisado-Pintado Victor Rodriguez-Galiano |
| author_facet | Aaron Cardenas-Martinez Adrian Pascual Emilia Guisado-Pintado Victor Rodriguez-Galiano |
| author_sort | Aaron Cardenas-Martinez |
| collection | DOAJ |
| description | The estimation of three-dimensional (3D) vegetation metrics from space-borne LiDAR allows to capture spatio-temporal trends in forest ecosystems. Structural traits from the NASA Global Ecosystem Dynamics Investigation (GEDI) are vital to support forest monitoring, restoration and biodiversity protection. The Mediterranean Basin is home of relict forest species facing the consequences of intensified climate change effects and whose habitats have been progressively shrinking over time. We used two sources of 3D-structural metrics, LiDAR point clouds and full-waveform space-borne LiDAR from GEDI to estimate forest structure in a protected area of Southern Spain, home of relict species in jeopardy due to recent extreme water-stress conditions. We locally calibrated GEDI spaceborne measurements using discrete point clouds collected by Airborne Laser Scanner (ALS) to adjust the geolocation of GEDI waveform metrics and to predict GEDI structural traits such as canopy height, foliage height diversity or leaf area index. Our results showed significant improvements in the retrieval of ecological indicators when using data collocation between ALS point clouds and comparable GEDI metrics. The best results for canopy height retrieval after collocation yielded an RMSE of 2.6 m, when limited to forest-classified areas and flat terrain, compared to an RMSE of 3.4 m without collocation. Trends for foliage height diversity (FHD; RMSE = 2.1) and leaf area index (LAI; RMSE = 1.6 m2/m2) were less consistent than those for canopy height but confirmed the enhancement derived from collocation. The wall-to-wall mapping of GEDI traits framed over ALS surveys is currently available to monitor Mediterranean sparse mountain forests with sufficiency. Our results showed that combining different LiDAR platforms is particularly important for mapping areas where access to in-situ data is limited and especially in regions with abrupt changes in vegetation cover, such as Mediterranean mountainous forests. |
| format | Article |
| id | doaj-art-a553b9d660a94875bb5f6df8e8e21cf7 |
| institution | Kabale University |
| issn | 2666-0172 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Science of Remote Sensing |
| spelling | doaj-art-a553b9d660a94875bb5f6df8e8e21cf72025-01-19T06:26:40ZengElsevierScience of Remote Sensing2666-01722025-06-0111100195Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodoAaron Cardenas-Martinez0Adrian Pascual1Emilia Guisado-Pintado2Victor Rodriguez-Galiano3Departamento de Geografía Física y Análisis Geográfico Regional, Universidad de Sevilla, 41004, Seville, Spain; Corresponding author.Department of Geographical Sciences, University of Maryland, College Park, MD, United StatesDepartamento de Geografía Física y Análisis Geográfico Regional, Universidad de Sevilla, 41004, Seville, SpainDepartamento de Geografía Física y Análisis Geográfico Regional, Universidad de Sevilla, 41004, Seville, SpainThe estimation of three-dimensional (3D) vegetation metrics from space-borne LiDAR allows to capture spatio-temporal trends in forest ecosystems. Structural traits from the NASA Global Ecosystem Dynamics Investigation (GEDI) are vital to support forest monitoring, restoration and biodiversity protection. The Mediterranean Basin is home of relict forest species facing the consequences of intensified climate change effects and whose habitats have been progressively shrinking over time. We used two sources of 3D-structural metrics, LiDAR point clouds and full-waveform space-borne LiDAR from GEDI to estimate forest structure in a protected area of Southern Spain, home of relict species in jeopardy due to recent extreme water-stress conditions. We locally calibrated GEDI spaceborne measurements using discrete point clouds collected by Airborne Laser Scanner (ALS) to adjust the geolocation of GEDI waveform metrics and to predict GEDI structural traits such as canopy height, foliage height diversity or leaf area index. Our results showed significant improvements in the retrieval of ecological indicators when using data collocation between ALS point clouds and comparable GEDI metrics. The best results for canopy height retrieval after collocation yielded an RMSE of 2.6 m, when limited to forest-classified areas and flat terrain, compared to an RMSE of 3.4 m without collocation. Trends for foliage height diversity (FHD; RMSE = 2.1) and leaf area index (LAI; RMSE = 1.6 m2/m2) were less consistent than those for canopy height but confirmed the enhancement derived from collocation. The wall-to-wall mapping of GEDI traits framed over ALS surveys is currently available to monitor Mediterranean sparse mountain forests with sufficiency. Our results showed that combining different LiDAR platforms is particularly important for mapping areas where access to in-situ data is limited and especially in regions with abrupt changes in vegetation cover, such as Mediterranean mountainous forests.http://www.sciencedirect.com/science/article/pii/S266601722500001XSpaceborne LiDAREcological mappingGeolocationGEDIForest structure |
| spellingShingle | Aaron Cardenas-Martinez Adrian Pascual Emilia Guisado-Pintado Victor Rodriguez-Galiano Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo Science of Remote Sensing Spaceborne LiDAR Ecological mapping Geolocation GEDI Forest structure |
| title | Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo |
| title_full | Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo |
| title_fullStr | Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo |
| title_full_unstemmed | Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo |
| title_short | Using airborne LiDAR and enhanced-geolocated GEDI metrics to map structural traits over a Mediterranean forestZenodo |
| title_sort | using airborne lidar and enhanced geolocated gedi metrics to map structural traits over a mediterranean forestzenodo |
| topic | Spaceborne LiDAR Ecological mapping Geolocation GEDI Forest structure |
| url | http://www.sciencedirect.com/science/article/pii/S266601722500001X |
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