Results 251 to 260 of about 561,233 (305)

Uniform generation of forests of restricted height

Information Processing Letters, 1994
Tree structures occur throughout the theory of information storage. Typically each tree node contains some data information and some pointers to other tree nodes. In most cases the number \(k\) of pointer fields is fixed and the structure is referred to as a \(k\)-way tree. More formally, a \(k\)-way tree can be defined as being either empty (having no
M. D. Atkinson, Jörg-Rüdiger Sack
openaire   +1 more source

On Polinsar System Requirements for Forest Height Mapping

IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium, 2018
Polarimetric interferometric SAR (PolinSAR) data are contaminated by cross-talk and channel imbalance. To ensure the successful estimation of forest heights from forthcoming PolinSAR campaigns, a critical study on the polarimetric system requirements of PolinSAR for forest height mapping must be carried out.
Xiao Wang 0020, Feng Xu 0001, Ya-Qiu Jin
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Global patterns and determinants of forest canopy height

Ecology, 2016
AbstractForest canopy height is an important indicator of forest biomass, species diversity, and other ecosystem functions; however, the climatic determinants that underlie its global patterns have not been fully explored. Using satellite LiDAR‐derived forest canopy heights and field measurements of the world's giant trees, combined with climate ...
Shengli, Tao   +4 more
openaire   +2 more sources

Three-Baseline InSAR Estimation of Forest Height

IEEE Geoscience and Remote Sensing Letters, 2014
In this letter we propose a three-baseline approach to the extraction of forest tree height from synthetic aperture radar data. Three polarimetric–interferometric pairs are used to constrain a physical model that relates forest parameters to multiple repeat-pass coherence observations.
Marco Lavalle, Kosal Khun
openaire   +1 more source

The Optimum Baseline Analysis for Polinsar Forest Height Mapping

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021
The interferometric vertical wavenumber (or baseline) has a direct impact on PolinSAR forest height mapping, which must be selected appropriately to acquire optimum inversion performance. In this paper, the key parameters influencing the height estimation precision are considered to simplify the system performance analysis.
Xiao Wang 0020, Feng Xu 0001, Ya-Qiu Jin
openaire   +1 more source

Height-biomass allometry in temperate forests performance accuracy of height-biomass allometry

IGARSS 2003. 2003 IEEE International Geoscience and Remote Sensing Symposium. Proceedings (IEEE Cat. No.03CH37477), 2004
Various remote sensing techniques do not derive forest biomass directly but forest parameters that are related to biomass such as forest height or LAI (leaf area index). This article focuses on the accuracy of the allometric relation relating forest biomass to forest height.
Tobias Mette   +2 more
openaire   +1 more source

Validation of forest height–age models

Canadian Journal of Forest Research, 1996
Forest height–age models are used in forest management to estimate height and (or) site index. It is useful to know the bias and precision of these models in order to evaluate their applicability. Methods are available for validating the models; however, many problems exist with the methods because of a lack of independence in the data and nonconstant
Gordon D. Nigh, Vera Sit
openaire   +1 more source

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