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Browsing by Author "Skidmore, AK"

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Hyperspectral predictors for monitoring biomass production in Mediterranean mountain grasslands: Majella national park, Italy

Author: Cho, Moses A ; Skidmore, AK Date: Jan 2009 The research objective was to determine robust hyperspectral predictors for monitoring grass/herbs biomass production on a yearly basis in the Majella National Park, italy. Hymap images were over the study area on 15 July 2004 and 4 July 2005. ... Read more
Hyperspectral remote sensing techniques for grass nutrient estimations in savannah ecosystems

Author: Ramoelo, Abel ; Cho, Moses A ; Mathieu, Renaud SA ; Skidmore, AK ; Scherf, M ; Heitkonig, I ; Prins, HHT ; Asner, G Date: Mar 2010 Information on the distribution of grass quality (nutrient concentration) is crucial in understanding rangeland vitality and facilitates effective management of wildlife and livestock. The spatial distribution of grass nutrient concentration ... Read more
Integrating environmental and in situ hyperspectral remote sensing variables for grass nitrogen estimation in savannah ecosystems

Author: Ramoelo, Abel ; Cho, Moses A ; Mathieu, Renaud SA ; Skidmore, AK ; Schlerf, M ; Heitkonig, IMA ; Prins, HHT Date: Apr 2011 Information about the distribution of grass nitrogen (N) concentration is crucial in understanding rangeland vitality and facilitates effective management of wildlife and livestock. A challenge in estimating grass N concentration using remote ... Read more
Mapping beech (Fagus sylvatica L.) forest structure with airborne hyperspectral imagery

Author: Cho, Moses A ; Skidmore, AK ; Sobhan, I Date: Jun 2009 The objective of this study was to assess the utility of hyperspectral data in estimating and mapping forest structural parameters including mean diameter-at-breast-height (DBH), mean tree height and tree density of a closed canopy beech ... Read more
Non-linear partial least square regression increases the estimation accuracy of grass nitrogen and phosphorus using in situ hyperspectral and environmental data

Author: Ramoelo, Abel ; Skidmore, AK ; Cho, Moses A ; Mathieu, Renaud SA ; Heitkönig, IMA ; Dudeni-Tlhone, N ; Schlerf, M ; Prins, HHT Date: Jun 2013 Grass nitrogen (N) and phosphorus (P) concentrations are direct indicators of rangeland quality and provide imperative information for sound management of wildlife and livestock. It is challenging to estimate grass N and P concentrations using ... Read more
The potential of Sentinel-2 spectral configuration to assess rangeland quality

Author: Ramoelo, Abel ; Cho, Moses A ; Mathieu, Renaud SA ; Skidmore, AK Date: Aug 2015 Sentinel-2 is intended to improve vegetation assessment at local to global scales. Today, estimation of leaf nitrogen (N) as an indicator of rangeland quality is possible using hyperspectral systems. However, few studies based on commercial ... Read more
Regional estimation of savanna grass nitrogen using the red-edge band of the RapidEye sensor

Author: Ramoelo, Abel ; Skidmore, AK ; Cho, Moses A ; Schlerf, M ; Mathieu, Renaud SA ; Heitkönig, IMA Date: Oct 2012 The regional mapping of grass nutrients is of interest in the sustainable planning and management of livestock and wildlife grazing. The objective of this study was to estimate and map foliar and canopy nitrogen (N) at a regional scale using ... Read more
Retrieval of leaf water content spanning the visible to thermal infrared spectra

Author: Ullah, S ; Skidmore, AK ; Ramoelo, Abel ; Groen, TA ; Naeem, M ; Ali, A Date: May 2014 The objective of this study was to investigate the entire spectra (from visible to the thermal infrared; 0.390 µm -14.0 µm) to retrieve leaf water content in a consistent manner. Narrow-band spectral indices (calculated from all possible two ... Read more
Spatial and temporal patterns of global H5N1 outbreaks

Author: Si, YL ; Debba, Pravesh ; Skidmore, AK ; Toxopeus, AG ; Li, L Date: Jul 2008 The global spread of highly pathogenic avian influenza (H5N1) in wild birds and poultry is considered a significant pandemic threat. Furthermore, human infections resulting from direct contact with infected birds/ poultry pose a serious ... Read more
Spatio-temporal dynamics of global H5N1 outbreaks match bird migration patterns

Author: Si, Y ; Skidmore, AK ; Wang, T ; de Boer, WF ; Debba, Pravesh ; Toxopeus, AG ; Li, L ; Prins, HHT Date: Nov 2009 The global spread of highly pathogenic avian influenza H5N1 in poultry, wild birds and humans, poses a significant pandemic threat and a serious public health risk. An efficient surveillance and disease control system relies on the understanding ... Read more
Towards regional mapping of grass nutrients using remote sensing in Greater Kruger National Park

Author: Ramoelo, Abel ; Skidmore, AK ; Cho, Moses A ; Mathieu, Renaud SA ; Schlerf, M ; Heitkonig, I ; Prins, HHT Date: Mar 2011 Regional maps of grass nutrients are important to inform decision making regarding the management of savanna ecosystems. Grass nutrients plays a crucial role in understanding the distribution, densities and feeding patterns of both wild ... Read more
Water-removed spectra increase the retrieval accuracy when estimating savanna grass nitrogen and phosphorus concentrations

Author: Ramoelo, Abel ; Skidmore, AK ; Schlerf, M ; Mathieu, Renaud SA ; Heitkönig, IMA Date: 2011 Information about the distribution of grass foliar nitrogen (N) and phosphorus (P) is important for understanding rangeland vitality and for facilitating the effective management of wildlife and livestock. Water absorption effects in the ... Read more

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Browsing by Author "Skidmore, AK"

Browsing by Author "Skidmore, AK"

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