| Autor: |
Emanuele Sibona, Alessandro Vitali, Fabio Meloni, Lucia Caffo, Alberto Dotta, Emanuele Lingua, Renzo Motta, Matteo Garbarino |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
|
| Zdroj: |
Forests, Vol 8, Iss 1, p 7 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
1999-4907 |
| DOI: |
10.3390/f8010007 |
| Popis: |
In this study, airborne laser scanning-based and traditional field-based survey methods for tree heights estimation are assessed by using one hundred felled trees as a reference dataset. Comparisons between remote sensing and field-based methods were applied to four circular permanent plots located in the western Italian Alps and established within the Alpine Space project NewFor. Remote sensing (Airborne Laser Scanning, ALS), traditional field-based (indirect measurement, IND), and direct measurement of felled trees (DIR) methods were compared by using summary statistics, linear regression models, and variation partitioning. Our results show that tree height estimates by Airborne Laser Scanning (ALS) approximated to real heights (DIR) of felled trees. Considering the species separately, Larix decidua was the species that showed the smaller mean absolute difference (0.95 m) between remote sensing (ALS) and direct field (DIR) data, followed by Picea abies and Pinus sylvestris (1.13 m and 1.04 m, respectively). Our results cannot be generalized to ALS surveys with low pulses density ( |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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