Results 31 to 40 of about 21,023 (158)

Deep learning-driven forest canopy height mapping in boreal regions through multi-source remote sensing fusion: Integrating Sentinel-1/2, PALSAR, and ICESat-2/LVIS data

International Journal of Applied Earth Observations and Geoinformation
Forest canopy height is a key indicator for estimating forest carbon sinks and managing vegetation growth. Existing methods for fusing optical and Light Detection and Ranging (LiDAR) data still have limitations in canopy height estimation for boreal ...
Chenxi Liu, Wei Gong, Shuo Shi, Tong Wang, Tao Xu, Zixi Shi, Jiayun Niu   +6 more
doaj   +1 more source

Robust and Parameter-Free Algorithm for Constructing Pit-Free Canopy Height Models [PDF]

ISPRS International Journal of Geo-Information, 2017
Data pits commonly appear in lidar-derived canopy height models (CHMs) owing to the penetration ability of airborne light detection and ranging (lidar) into tree crowns. They have a seriously negative effect on the quality of tree detection and subsequent biophysical measurements.
Chuanfa Chen, Yifu Wang, Yanyan Li, Tianxiang Yue, Xin Wang   +4 more
openaire   +3 more sources

A 3-D Spatial–Spectral–Temporal Deep Regression Model for Improving Mangrove Canopy Height Estimation Through Fusion of Optimized Red-Edge Sentinel-2 Bands and Sentinel-1 SAR Data

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Mangroves are vital blue carbon ecosystems with high carbon storage, where canopy height is a key parameter for estimating above-ground biomass.
Ilham Jamaluddin, Ying-Nong Chen, Amalia Gita Ayudyanti, Lin Hui, Kuo-Chin Fan   +4 more
doaj   +1 more source

Unmanned aerial vehicle based tree canopy characteristics measurement for precision spray applications

Smart Agricultural Technology, 2023
The critical components for applying the correct amount of agrochemicals are fruit tree characteristics such as canopy height, canopy volume, and canopy coverage.
Md Sultan Mahmud, Long He, Paul Heinemann, Daeun Choi, Heping Zhu   +4 more
doaj   +1 more source

Exploring the Relationship between Forest Canopy Height and Canopy Density from Spaceborne LiDAR Observations

Remote Sensing, 2021
Forest structure is a useful proxy for carbon stocks, ecosystem function and species diversity, but it is not well characterised globally. However, Earth observing sensors, operating in various modes, can provide information on different components of ...
Heather Kay, Maurizio Santoro, Oliver Cartus, Pete Bunting, Richard Lucas   +4 more
doaj   +1 more source

Canopy Height Estimation in French Guiana with LiDAR ICESat/GLAS Data Using Principal Component Analysis and Random Forest Regressions

Remote Sensing, 2014
Estimating forest canopy height from large-footprint satellite LiDAR waveforms is challenging given the complex interaction between LiDAR waveforms, terrain, and vegetation, especially in dense tropical and equatorial forests.
Ibrahim Fayad, Nicolas Baghdadi, Jean-Stéphane Bailly, Nicolas Barbier, Valéry Gond, Mahmoud El Hajj, Frédéric Fabre, Bernard Bourgine   +7 more
doaj   +1 more source

Method to Reduce the Bias on Digital Terrain Model and Canopy Height Model from LiDAR Data [PDF]

Remote Sensing, 2019
Underestimation of LiDAR heights is widely known but has never been evaluated for several sensors and for diverse types of ecological conditions. This underestimation is mainly linked to the probability of the pulse to reach the ground and the top of vegetation.
Marie-Soleil Fradette, Antoine Leboeuf, Martin Riopel, Jean Bégin   +3 more
openaire   +3 more sources

Estimating Site Index From Short-Term TanDEM-X Canopy Height Models [PDF]

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016
The tree height growth from three vegetation seasons was fitted to height growth curves in order to estimate the site index, which is a variable related to forest site productivity. The tree height growth was evaluated for four different cases, in which remote sensing data from TanDEM-X and airborne laser scanning were used.
Henrik J. Persson, Johan E. S. Fransson
openaire   +3 more sources

CANOPY HEIGHT MODELS TO MONITOR AREAS UNDER DEGRADATION IN MIXED OMBROPHILE [PDF]

Revista Árvore, 2016
ABSTRACT This research was aimed at providing a study of digital elevation models from Airborne Laser Scanner (ALS) data. The goal was to improve the forest monitoring, or more specifically, arboreal canopy monitoring, which contains the most elevated vegetation of the forest. It is also described as the surface above the canopy top. The region of rain
Alixandrini Junior, Mauro José, Valadares, Josmar Oliveira, Loch, Carlos   +2 more
openaire   +4 more sources

Landsat-Scale Regional Forest Canopy Height Mapping Using ICESat-2 Along-Track Heights: Case Study of Eastern Texas

Remote Sensing, 2022
Spaceborne profiling lidar missions such as the Ice, Cloud, and land Elevation Satellite-2 (ICESat-2) are collecting direct elevation measurements, supporting the retrieval of vegetation attributes such as canopy height that are crucial in forest carbon ...
Lonesome Malambo, Sorin Popescu, Meng Liu   +2 more
doaj   +1 more source